Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.13 Best Smart Beds | Stop Waking Up Stiff and Sore

A smart bed does more than just elevate your head—it’s a fully adjustable sleep system designed to target back pain, reduce snoring, and create personalized comfort zones for you and your partner. Whether you need zero-gravity relief, a built-in massage, or app-controlled positioning, these bases transform a standard mattress into a therapeutic sleep environment.

I’m Mohammad — the founder and writer behind ProteinJug. I’ve spent years analyzing adjustable bed frames, hybrid mattress construction, and motor systems to separate the gimmicks from the genuinely therapeutic designs.

After comparing dozens of models across price tiers, I’ve compiled the most thorough guide to the best smart beds for every body type, budget, and sleep need.

How To Choose The Best Smart Beds

Not all smart beds deliver the same therapeutic value. The biggest mistake buyers make is picking a cheap base without considering the motor quality, mattress compatibility, or position flexibility that actually relieves pressure. Focus on these factors before you hit buy.

Motor Quality and Noise Output

The motor is the heart of any smart bed. Premium models use German-engineered OKIN motors that operate nearly silently, while budget units buzz audibly during adjustments. A loud motor disrupts sleep—especially if you shift positions during the night. Always check customer feedback for motor volume and test timers.

Mattress Construction and Certifications

A smart base is only as good as the mattress on top. Hybrid designs with pocket springs and gel-infused memory foam offer the best shape recovery and heat dissipation for adjustable use. Look for CertiPUR-US certification to guarantee no harmful chemicals or heavy metals. Copper-gel and cooling foam layers prevent heat buildup when the head or foot is elevated.

Position Presets and Connectivity

Zero Gravity, Anti-Snore, and Pillow-Tilt are the three essential presets that directly impact health outcomes. App control adds convenience, but the wireless remote reliability matters more for nightly use. Memory buttons let you save custom positions, which is critical for splitting use between reading, TV, and sleep.

Quick Comparison

On smaller screens, swipe sideways to see the full table.

Model Category Best For Key Spec Amazon
Sven & Son Platinum Premium Bundle Lumbar Support & Wall Hugging 25-year warranty Amazon
ESHINE 5000 Split King Premium Bundle OKIN Motors & Pillow-Tilt German OKIN motors Amazon
Sven & Son Essential Mid-Range Bundle Split King Value Bundle 75° head lift Amazon
SFE Split King Mid-Range Bundle Dual Massage & Cooling Gel Triple-layered gel foam Amazon
GhostBed Adjustable Base Premium Base 5-Mode Massage & Zero Gravity Lifetime limited warranty Amazon
Blissful Nights Ananda Premium Bundle Alexa Voice & App Control 120-day sleep trial Amazon
ESHINE 2000 King Mid-Range Bundle Bluetooth App & Hybrid Coils 783 pocket springs Amazon
ESHINE Queen 5000 Mid-Range Bundle Queen Combo with 5-Layer Foam 319 independent springs Amazon
MLILY EGOHOME Split King Mid-Range Bundle Copper Gel Memory Foam 750 lb weight capacity Amazon
Irvine Home Collection Full Mid-Range Bundle Full Size Adjustable Set 75° head / 45° foot Amazon
ESHINE Twin XL 5000 Mid-Range Bundle Single Sleeper with Pillow-Tilt 319 spring hybrid Amazon
Marsail Split King Base Entry-Level Base Smart App Control Base Only 3-speed vibration Amazon
Nestl Adjustable Frame King Entry-Level Base Budget King Base with Massage 750 lb weight limit Amazon

In‑Depth Reviews

Best Overall

1. Sven & Son Platinum Adjustable Bed Base + Hybrid Mattress

25-Year WarrantyPillow-Tilt

The Sven & Son Platinum is the most feature-dense smart bed bundle we’ve tested, combining a head-pillow-tilt mechanism, independent lumbar support, and a wall-hugging headboard feature that prevents your nightstand gap. The base articulates up to 75 degrees at the head and 45 degrees at the foot, which is the widest range across this entire list. Owners report significant reductions in hip and back arthritis pain after consistent zero-gravity use.

The 14-inch hybrid mattress uses bionic cooling gel memory foam over innerspring coils, which keeps the surface temperature neutral even during long elevated sessions. The mattress retention system prevents sliding, and the adjustable legs let you fine-tune the height to match your existing bed frame. Users with sleep apnea found the pillow-tilt combined with anti-snore preset cleared airways without a CPAP mask shift.

The ergonomic remote feels intuitive, but the app connection can be spotty—some owners needed multiple attempts to pair. Assembly requires two people because the frame weighs over 500 pounds split across boxes. The 25-year prorated warranty is the strongest coverage in this category, though white glove service quality varies by region. The split king gap between mattresses can be a nuisance for couples, but the overall comfort and motor quietness justify the investment.

Why it’s great

  • Head-pillow-tilt plus lumbar support for precise spinal alignment
  • Wall-hugging design keeps you close to nightstand
  • 25-year warranty outpaces all competitors

Good to know

  • Very heavy—assembly requires two strong people
  • App connection can be unreliable
Luxury Bundle

2. ESHINE 5000 Series Split King Adjustable Bed + 14″ Hybrid Mattress

OKIN MotorsPillow-Tilt

The ESHINE 5000 Series stands out for its German-engineered OKIN motors, which operate with whisper-quiet precision even under heavy loads. The split king design lets each side move independently—head, foot, and pillow-tilt are all adjustable per sleeper. The 5-layer hybrid mattress includes gel-infused air memory foam, high-density memory foam, and a 6.3-inch pocket spring system with 319 independent springs, which cradles pressure points without sagging.

This bundle also features massage modes (wave, pulse, full-body) with three intensity levels, plus a programmable timer between 10 and 30 minutes. The wireless remote offers 19 buttons including anti-snore and zero-gravity presets. Owners consistently mention that the bed matches or outperforms high-end name brands at a fraction of the cost, with one buyer replacing a k Tempur-Pedic setup with this unit.

Customer service response times can be slow during off-hours, and some units arrived with minor shipping damage (tears in the fabric side panels). The legs adjust to only two heights (8 or 11.4 inches), which limits under-bed storage options. The 10-year warranty covers motors and frame, but not cosmetic damage. Still, for the motor quality and mattress construction, this is a top-tier value for split king buyers.

Why it’s great

  • German OKIN motors deliver silent, smooth articulation
  • 5-layer hybrid mattress with gel infusion stays cool
  • Pillow-tilt adds extra neck support beyond head lift

Good to know

  • Customer support not available 24/7
  • Only two leg height options limit storage flexibility
Best Value Bundle

3. Sven & Son Essential Adjustable Bed Base + 14″ Hybrid Mattress

75° Head LiftZero Gravity

The Sven & Son Essential delivers the highest head-lift angle (75 degrees) in the mid-range bracket, making it ideal for reading, TV watching, and acid reflux relief. The split king bundle includes two twin XL bases and two 14-inch hybrid mattresses with bionic cooling gel memory foam over innerspring coils. The zero-gravity preset takes pressure off the lower back, which buyers with chronic back pain praise after just a few nights.

Assembly is straightforward—the bases arrive pre-assembled and only require screwing on six legs and plugging in the power cord. Owners describe it as “economical comfort” that doesn’t sacrifice durability. The mattress is medium-soft with a plush quilted cover that uses heat-wicking technology to prevent night sweats. The wireless remote includes memory position storage, one-touch flat, and a built-in flashlight for late-night navigation.

The legs are not adjustable, which makes the bed very tall (12-inch legs plus 14-inch mattress equals 26 inches high). Short sleepers and smaller dogs have trouble climbing onto the bed. The mattress tends to shift sideways slightly on the base because there are no side retention brackets. The 10-year warranty is solid, but it covers parts only and does not include comfort guarantees. Despite these quirks, the combination of price, lift range, and mattress quality makes this a strong mid-range pick.

Why it’s great

  • 75-degree head lift—highest in its price class
  • Bionic cooling gel foam prevents overheating
  • Quick 15-minute assembly from box to use

Good to know

  • Non-adjustable legs make the bed too tall for some
  • Mattress can shift sideways without retention brackets
Cool Sleep Choice

4. SFE Split King Adjustable Bed Frame with 12″ Gel Memory Foam Mattress

Triple-Layer GelDual Massage

The SFE Split King bundle focuses on temperature regulation with a triple-layered gel memory foam mattress: cooling gel foam on top, comfort foam in the middle, and high-density foam at the base. The cover is a soft jacquard weave that promotes airflow, and the 3D cutting technology allows the foam to conform to the adjustable base’s contours without bunching. Owners with hot-sleeping partners report significantly less night sweat compared to traditional memory foam.

The adjustable base offers head lift (0–60 degrees) and foot lift (0–45 degrees) with five preset comfort modes including zero gravity. The massage system lets you choose between head-only, foot-only, or full-body vibration at three intensity levels with a programmable timer. The wireless remote and app both work reliably, and the under-bed lighting provides soft blue illumination for nighttime navigation.

The frame lacks headboard attachment brackets, so it cannot be paired with a traditional headboard without modifications. Some buyers dislike the persistent blue glow from the under-bed lights, which cannot be turned off completely. The 12-inch mattress height is slightly thinner than the 14-inch competition, which may feel less plush for heavier individuals. The CertiPUR-US certification ensures no off-gassing, and the assembly is simple with two people handling the 333-pound total weight.

Why it’s great

  • Triple-layer gel memory foam stays noticeably cool
  • CertiPUR-US certified with zero off-gassing
  • Vibration massage helps relax back muscles before sleep

Good to know

  • No headboard attachment option included
  • Blue under-bed glow cannot be disabled
Premium Base

5. GhostBed Adjustable Bed Frame Base (Queen)

5-Mode MassageLifetime Warranty

The GhostBed adjustable base is a base-only option (no mattress included) that focuses on premium motor quality and therapeutic massage. The frame uses a quiet motor system that owners describe as “whisper-quiet” even during full articulation—a critical feature for light sleepers. It offers zero gravity, anti-snore, and flat presets, plus a 5-mode interactive massage unit that targets full-body tension. The massage intensity is stronger than most competitors, delivering genuine muscle relief rather than surface vibration.

Setup takes about 15 minutes with one person, though the 100-pound frame is unwieldy to carry upstairs alone. The base fits inside most existing bed frames, and the wireless remote includes a flashlight and memory positions. The GhostBed brand backs it with a lifetime limited warranty, which is rare for a base-only product at this price point. Owners with ALS and mobility issues reported that the independent head and foot controls restored a sense of independence.

Some units arrived with torn fabric on the side panels due to shipping damage, and missing bolts were reported in a handful of packages—though these were resolved with customer support. A strong chemical smell from the grey fabric sides was noted by a few buyers, though it faded after a few days. If you already own a quality mattress, this base delivers hospital-grade articulation and the best warranty in its class.

Why it’s great

  • 5-mode massage provides genuine muscle relief
  • Lifetime limited warranty is industry-leading for a base
  • Quiet motor system ideal for light sleepers

Good to know

  • Base only—no mattress included
  • Some units have shipping damage to fabric sides
Smart Home Pick

6. Blissful Nights Ananda 12″ Pearl & Cool Gel Memory Foam + Adjustable Base

Alexa Voice120-Day Trial

The Blissful Nights Ananda bundle is the only model on this list with native Amazon Alexa voice control and a dedicated phone app, making it the most connected smart bed. The 12-inch pearl and cool gel-infused memory foam mattress uses an articulating groove system that bends cleanly with the adjustable base—no bunching or buckling. The mattress is CertiPUR-US certified and designed and assembled in the USA, which appeals to buyers who prioritize domestic manufacturing.

The adjustable base includes dual massage (both head and foot independently), zero gravity, anti-snore, and a pillow-tilt function that goes beyond standard head incline. The wireless remote is backlit, and the under-bed LED lighting provides glare-free illumination. The mattress features a removable, washable cover, which is a hygiene advantage over sealed foam mattresses. Owners who have had the bed for several years report consistent support and no sagging.

The split king versions (two twin XL frames) create a gap in the middle that can be problematic for couples during intimacy—a common issue with split designs. The massage function uses vibration rather than deep tissue, which some buyers found underwhelming. The 120-day sleep trial is generous, but returns require coordinating with the manufacturer rather than Amazon. The mattress is medium-firm, so side sleepers may need a topper for pressure relief at the shoulders.

Why it’s great

  • Native Alexa voice and phone app control
  • Removable, washable mattress cover
  • Articulating grooves prevent mattress bunching

Good to know

  • Split king gap can disrupt couple comfort
  • Massage is vibration-based, not deep tissue
App-Controlled Bundle

7. ESHINE 2000 Series King Adjustable Bed Frame + 14″ Memory Foam Hybrid

783 Pocket SpringsBluetooth App

The ESHINE 2000 Series pairs a Bluetooth app-controlled frame with a 14-inch memory foam hybrid mattress featuring 783 motion-isolating independent pocket springs. The spring density is the highest in this review, which translates to excellent edge support and motion transfer reduction—especially helpful for couples in a standard king (non-split) configuration. The mattress has a medium-soft feel that accommodates side, back, and stomach sleepers without excessive sinkage.

The adjustable frame articulates the head to 55 degrees and the foot to 42 degrees, which is slightly less range than the premium models but still sufficient for reading, TV, and anti-snore positioning. The ESHINE app works on iOS and Android and allows fine-tuned adjustments from your phone. Assembly takes about 5 minutes per the manufacturer, though owners report closer to 30 minutes for full unboxing and setup. The frame is heavy but manageable with two people.

Some owners found the mattress slides sideways over time because the side retention bar is only at the foot. Tall users (over 6 feet) experienced calf pressure when both head and foot were elevated—a positioning issue that required sliding the mattress past the footboard. The motor is quiet enough for couples but is not quite as silent as OKIN-equipped models. The 5-year warranty is shorter than the competition, but the combination of spring count and app connectivity is unique at this price.

Why it’s great

  • 783 pocket springs provide excellent motion isolation
  • Bluetooth app control works reliably on both OS platforms
  • 5-minute assembly claims are realistic with two people

Good to know

  • Mattress slides sideways without side retention brackets
  • Head lift maxes at 55°—less than premium models
Queen Combo

8. ESHINE Queen 5000 Series Adjustable Bed Frame + 14″ Hybrid Mattress

319 SpringsOKIN Motors

The queen version of the ESHINE 5000 Series offers the same German OKIN motors and 5-layer mattress construction (gel-infused air memory foam, high-density memory foam, 319 pocket springs) as the split king, but in a single queen footprint. This is the best option for solo sleepers or couples who do not want the split king gap but still want full adjustability. The OKIN motors are near-silent during operation, a feature that owners consistently praise after months of use.

Massage modes include wave, pulse, and full-body vibration with three intensity levels and a timer that runs 10 to 30 minutes. The pillow-tilt function adds an extra 10–15 degrees of neck elevation beyond the standard head lift, which is particularly effective for sinus congestion and sleep apnea positioning. The wireless remote offers 19 buttons, including anti-snore and zero-gravity presets. The legs adjust to two heights (8 or 11.4 inches), giving some flexibility for bedframe matching.

Customer service responsiveness is inconsistent—some buyers report quick replacement of defective parts, while others could not get through via phone. The mattress is heavy and difficult to reposition once set up, so placement must be deliberate. The 10-year warranty covers motor and frame defects but excludes cosmetic issues like fabric tears from shipping. The queen size limits the mattress’s pocket spring count compared to the king version (319 vs. 783), but the comfort and support are still excellent for one or two average-sized sleepers.

Why it’s great

  • OKIN motors deliver whisper-quiet articulation
  • No split gap—ideal for couples who want a solid surface
  • Pillow-tilt improves sinus relief and airway opening

Good to know

  • Customer support is not reliably available
  • Matress is very heavy to reposition after placement
Copper Gel Bundle

9. MLILY EGOHOME Split King Adjustable Bed Frame + 14″ Memory Foam Mattress

750 lb CapacityICA Endorsed

MLILY’s EGOHOME bundle is the only set that includes an International Chiropractors Association endorsement for its copper gel memory foam mattress, which lends clinical credibility for back pain relief. The split king includes two twin XL frames and two 14-inch memory foam mattresses, each with CertiPUR-US certification. The copper infusion is designed to dissipate body heat faster than standard gel, and owners report sleeping cooler than with previous memory foam beds.

The adjustable base offers head incline from 0 to 57 degrees and foot incline from 0 to 38 degrees. The wireless remote includes two preset positions (zero gravity and anti-snore) plus a memory mode for saving custom angles. The frame is constructed from premium alloy steel and holds up to 750 pounds, which is the highest weight capacity among the bundles tested. Assembly is fast because the frame folds flat and only requires leg attachment and power connection.

The mattress is noticeably firm out of the box and takes up to two weeks to break in fully. Side sleepers may find it too firm without a pillow-top pad, as noted in multiple owner reviews. The split king frame lacks a center clip to hold the two bases together, so they can drift apart over time if not anchored to a headboard. The vacuum-compressed mattress expands fully in about 24 hours but has a slight initial odor that dissipates. There is no trial period, and opened mattresses cannot be returned.

Why it’s great

  • ICA endorsement adds credible back pain relief backing
  • Copper gel memory foam runs cooler than standard gel
  • 750 lb total weight capacity supports heavier sleepers

Good to know

  • Matress very firm initially—needs break-in period
  • No center clip to hold split bases together
Full Size Starter

10. Irvine Home Collection Premium Full Adjustable Bed + 14″ Gel Memory Foam Mattress

Zero ClearanceDual Massage

The Irvine Home Collection bundle is one of the few full-size (54″ x 75″) adjustable smart bed sets on the market, making it a perfect fit for guest rooms, teens, or single sleepers who don’t need a queen or king footprint. The base offers a 75-degree head incline and 45-degree foot incline, which is competitive with full-size frames costing twice as much. It includes dual massage targeting upper body, lower body, or both, plus multiple intensity levels.

The 14-inch gel memory foam mattress is CertiPUR-US certified and designed specifically for use with an adjustable base—the foam is flexible enough to bend without cracking. The base features zero-clearance design, meaning it can be placed directly on a platform or box spring without extra support. Assembly takes about 5 minutes: screw on the legs, flip the frame, plug it in. Owners praise the quiet motor and sturdy steel construction.

The massage feature is noticeably weaker than the premium options—it’s more of a surface vibration than deep tissue therapy. The USB ports and under-bed lighting on some units stopped working after a few months, suggesting inconsistent electrical component quality. The maximum leg height is only 9 inches, which makes the bed lower than average—difficult for tall users or those with mobility issues to get out of. Despite these flaws, it’s the only full-size adjustable bundle at this price that includes a quality mattress.

Why it’s great

  • Rare full-size adjustable bundle for smaller spaces
  • 75°/45° lift range matches larger premium frames
  • Zero-clearance design fits on any platform

Good to know

  • Massage vibration is weaker than premium models
  • USB ports and lights may fail within months
Twin XL Bundle

11. ESHINE Twin XL 5000 Series Adjustable Bed Frame + 14″ Hybrid Mattress

Pillow-Tilt319 Springs

The Twin XL version of the ESHINE 5000 Series gives single sleepers access to the same 5-layer hybrid mattress and OKIN motor system that the larger sizes use. The 319 pocket spring system provides better edge support than all-foam mattresses, which matters on a narrower twin XL surface. The pillow-tilt function is especially beneficial for solo sleepers who need precise neck support for snoring or sinus issues.

The 19-button wireless remote and smart app control allow full access to zero gravity, anti-snore, and custom memory positions. Assembly requires no tools—the frame unfolds, legs screw in manually, and the power cord plugs directly into a standard outlet. Owners report the twin XL is heavy but manageable with assistance, and the massage functions (wave, pulse, full-body) are surprisingly strong for a single-motor unit. The CertiPUR-US certification ensures the mattress is safe for daily use.

Some units arrived with minor cosmetic damage from shipping, and customer support is not available outside specific hours (5pm–2am CT). The 30-minute massage timer maxes out too quickly for some users who want longer vibration sessions. The frame is not compatible with most traditional headboards unless standalone. The 10-year warranty provides adequate long-term coverage for the motor and frame, but owners should document any shipping damage immediately.

Why it’s great

  • Twin XL format brings premium OKIN motors to a single bed
  • Pillow-tilt improves neck positioning for solo sleepers
  • Tool-free assembly takes under 10 minutes

Good to know

  • Matress timer limited to 30-minute massage cycles
  • Customer support only available limited hours
Base-Only Value

12. Marsail Split King Adjustable Bed Base Pro

3-Speed MassageApp Control

The Marsail Split King Adjustable Bed Base is a base-only option that offers wireless remote and smartphone app control for a very competitive price point. Each twin XL base can be controlled independently, allowing partners to set their own head/foot incline, massage speed, and under-bed lighting. The frame is built from heavy-duty steel and weighs about 103 pounds total, making it more portable than many solid-steel competitors.

The massage system has three vibration speeds (gentle, medium, intense) and is strong enough to be felt through a thick mattress. The wireless remote includes five preset positions: Reading, TV, Gaming, Anti-Snore, and Sleep. The under-bed LED light is soft enough not to disturb a partner but bright enough for safe nighttime navigation. Both sides include USB-A and USB-C ports, plus side storage pockets for phones and small essentials.

Motor noise is minimal but not silent—there is a faint vibration sound during adjustments that some light sleepers notice. The base does not include a mattress, so buyers must purchase one separately, which can increase overall cost if a quality hybrid is needed. Some buyers reported delivery issues (boxes left on sidewalks) and the frame is heavy enough that a single person will struggle to move it upstairs. The adjustable legs are a positive feature, allowing height customization between 3 and 12 inches.

Why it’s great

  • Independent twin XL controls for partner comfort
  • USB-A and USB-C ports on both sides
  • Adjustable leg height for frame matching

Good to know

  • Base only—requires separate mattress purchase
  • Motor emits faint vibration noise during adjustment
Entry-Level Base

13. Nestl Adjustable Bed Frame (King)

750 lb CapacityLED Lighting

The Nestl Adjustable Bed Frame is the most affordable king-sized base in this review, offering a solid foundation with head and foot massage, zero-gravity preset, and under-bed LED lighting. The frame measures 79″ x 74″ x 15″ with a 750-pound weight capacity, making it compatible with most standard king mattresses. The wireless remote includes manual position adjustments, programmable memory, and one-touch presets for TV, lounge, zero gravity, flat, and anti-snore.

Assembly is remarkably simple—the frame arrives mostly pre-assembled; you just attach the legs and plug in the power cord. Owners report setup times under 15 minutes with two people. The massage feature offers three modes (head, foot, or both) with three intensity levels and a 10–30 minute timer. The dual USB ports are conveniently located on the side of the frame, and the under-bed LED lights provide gentle ambient illumination.

The frame is extremely heavy (176 pounds) and awkward to maneuver for a single person—delivery teams may leave the box at the curb, so plan for extra help. The massage motor is somewhat noisier than premium options, with a noticeable hum during operation. The leg design uses cones that make the initial height very tall, which may not suit all bedframes or users with mobility challenges. Despite these compromises, it is a remarkably capable base for buyers who want adjustable features at the lowest entry point.

Why it’s great

  • Lowest-priced king-sized adjustable base with full features
  • Quick assembly—under 15 minutes out of the box
  • 750 lb weight capacity handles heavy mattresses

Good to know

  • Massage motor is louder than premium bases
  • Extremely heavy—needs 2–4 people for safe setup

FAQ

Can I use any mattress on a smart bed base?
Not all mattresses are compatible. Memory foam and hybrid mattresses with pocket springs flex well with adjustable bases. Traditional innerspring mattresses with continuous coils can buckle or sag when articulated. Always check the manufacturer’s specifications for adjustable base compatibility.
Does zero gravity actually relieve back pain?
Yes, the zero-gravity position (head and knees elevated) distributes body weight evenly across the mattress, reducing pressure on the lumbar spine. Multiple owners in this review reported significant reductions in chronic back pain and sciatica after regular zero-gravity sleep. Chiropractic endorsements on some models reinforce the clinical benefit.
How important is the massage feature on a smart bed?
The massage feature varies widely by motor quality. OKIN-equipped models deliver genuine muscle-relaxing vibration, while budget bases offer surface-level buzzing. If you have chronic muscle tension or fibromyalgia, prioritize bases with multiple intensity levels and a timer. For occasional relaxation, even basic massage can help wind down before sleep.

Final Thoughts: The Verdict

For most users, the best smart beds winner is the Sven & Son Platinum because it combines a 25-year warranty, pillow-tilt, lumbar support, and a cooling hybrid mattress into a single premium package. If you want silent OKIN motors and a split king design, grab the ESHINE 5000 Series — it matches high-end performance at a significantly lower investment. And for budget-conscious buyers who want a reliable entry-level base with massage and zero gravity, the Nestl Adjustable Frame delivers essential smart bed features without the premium price tag.