WinkBed GravityLux Queen

What's Actually Inside This Thing (And Why It Matters)

I've been sleeping on a platform bed in Austin for six years. August here is brutal. I'm talking 100°F nights where the wrong mattress turns into a heat trap by 2 a.m. So when the GravityLux arrived in a box that took two people to move, my first test was simple: would I wake up sweating?

Short answer: no. But let me explain why, because the construction here is genuinely interesting.

The GravityLux is an 11-inch all-foam mattress built in three functional layers. The cover is TENCEL, a fabric made from wood pulp that's naturally moisture-wicking, tufted with 2 inches of cooling gel foam directly underneath. That combination is doing real work. TENCEL has about 50% better moisture management than cotton, and the gel infusion in the foam helps dissipate heat rather than trap it. I've tested mattresses with gel foam that still ran hot because the cover was cheap polyester. The TENCEL cover here actually lets the cooling tech do its job.

Below that sits WinkBed's AirCell Memory Foam comfort layer. This is the layer that gives the GravityLux its signature feel, that deep, slow-sinking hug that memory foam fans love, but with open-cell construction that keeps airflow moving. Then comes the part I find most impressive: a five-zone progression foam layer. It's engineered to be firmer under your hips and lumbar, and softer under your shoulders and legs.

I've tested zoned mattresses where the zones are basically a marketing claim, you lie on them and feel nothing differentiated. The GravityLux is not that. At 165 lbs as a combination sleeper, I could actually feel my hips getting more pushback while my shoulder sank in more freely when I rolled to my side. It's subtle, but it's real. The base is 1.8lb density ATLAS Core support foam. That density number matters for longevity, anything under 1.5lb tends to break down faster. At 1.8lb, this mattress should hold its shape for a long time.

All foams are CertiPUR-US certified and American-made. No off-gassing issues in my experience, the smell dissipated within 24 hours, which is average to slightly better than average for foam beds.

Three Firmness Options: Which One Should You Actually Get?

WinkBed rates the Soft at 4/10, Medium at 6/10, and Firm at 8/10 on a standard firmness scale. I tested the Medium. Here's my honest take on all three options based on the construction and my experience with the Medium.

The Medium at 6/10 is genuinely versatile. It's the pick I'd recommend to most people reading this, especially combination sleepers like me who need a mattress that works in multiple positions without feeling either punishingly firm on your side or unsupportively soft on your back. I spent six weeks rotating between back sleeping, side sleeping, and stomach sleeping (yes, I know, stomach sleeping is terrible for your spine, but I still do it sometimes). The Medium handled all three better than any all-foam mattress I've tested at this price point.

The Soft at 4/10 is aimed at dedicated side sleepers and lighter-weight individuals who need maximum shoulder and hip contouring. If you're under 130 lbs and sleep exclusively on your side, the Soft is probably your best bet. But I'd be cautious recommending it to anyone over 180 lbs, at that weight, a 4/10 soft foam mattress can start to feel unsupportive at the lumbar, and you may sink too deep to maintain spinal alignment.

The Firm at 8/10 is for back and stomach sleepers who want real pushback. Heavier individuals - 200 lbs and up, will likely find the Medium compresses more than they want, making the Firm the better call. One thing worth knowing: with the five-zone construction, even the Firm option has softer zones at the shoulders, so it's not the plank-like firmness you get from some cheaper foam beds.

The $49 exchange fee during the trial is a real consideration here. If you get the firmness wrong, you're paying to swap. That's not the end of the world, but it's annoying when competitors like Saatva let you exchange for free. Pick carefully using the guidelines above, and you'll likely be fine. Get it wrong and that fee stings a little on a $1,799 mattress.

Cooling in Austin Heat: A Real-World Test, Not a Lab Stat

NapLab gave the GravityLux a 9.0 out of 10 for cooling. That's a high score, and in my testing it held up, but with some context that matters.

I tested this mattress through July and August in Austin. My bedroom sits at about 72°F with the AC running. I'm a warm sleeper. I've returned mattresses purely because they trapped heat. The GravityLux did not make my hot-sleeper problem worse, which sounds like a low bar but genuinely isn't for an all-foam mattress.

The TENCEL cover pulls moisture away from your skin fast. I noticed this most in the first hour of sleep, when your body is naturally releasing heat as it transitions into sleep cycles. Traditional memory foam covers hold that warmth against you. The TENCEL cover here disperses it. Combined with the gel foam directly beneath, the surface temperature stays noticeably cooler than average.

I'll be straight with you though: this is still an all-foam mattress. If you're an extremely hot sleeper, the kind who soaks through sheets, no all-foam mattress is going to solve your problem completely. Hybrids with coil systems have better passive airflow because the coil layer creates actual air channels. The GravityLux does the best job of any all-foam I've tested at managing heat, but it has physical limits. If cooling is your absolute top priority, a hybrid like the Saatva Classic is going to outperform it.

For moderate hot sleepers, people who run warm but don't drench their sheets, the GravityLux is genuinely impressive. That 9.0 out of 10 score from NapLab aligns with my experience. It's the best all-foam option I've personally slept on for heat management.

The Motion Transfer Problem: Why Couples Should Pay Attention

Here's where I stop being enthusiastic and get honest. The GravityLux scored 6.9/10 for motion transfer. In a category where the best performers hit 9.0 or above, 6.9 is below average. And it surprised me, because memory foam is usually the gold standard for motion isolation.

The issue is the AirCell construction. The open-cell foam that makes this mattress breathe and respond so quickly, that 9.7 out of 10 response score, is the same thing that transmits motion more than traditional dense memory foam would. You're trading one thing for another. Faster response and better cooling come at the cost of some motion isolation.

I had my partner test this with me for two weeks. She's a light sleeper. When I rolled over at night, she noticed it. Not dramatically, it's not like sleeping on a bouncy innerspring, but she felt the movement. On a traditional dense memory foam mattress, she typically doesn't feel anything. That's a real difference for couples where one person moves a lot.

Who this doesn't matter for: solo sleepers, couples where one or both partners are deep sleepers, or couples who sleep on opposite sides of a king. If you're sharing a queen with a light sleeper who wakes easily, I wouldn't buy this mattress without having that conversation first.

Sleep Advisor rated it highly overall and still flagged motion isolation as a strong point in their summary. I'd push back on that characterization. A 6.9 is not a strength. It's an acceptable weakness if the rest of the mattress fits your needs. Know what you're getting.

$1,799 for an All-Foam Mattress: Does the Math Work?

I've tested mattresses across every price tier. The GravityLux at $1,799 is 69% above the average price for an all-foam queen. That's a lot of money to spend on a product that doesn't have coils, latex, or any of the materials that typically justify premium pricing in the mattress world.

So what are you actually paying for? The 1.8lb density foam is the honest answer. Cheaper all-foam mattresses use 1.2-1.5lb density foam that compresses and develops body impressions within a few years. The ATLAS Core at 1.8lb is built to last significantly longer. Combined with the lifetime warranty, the long-term cost-per-year calculation looks better than the sticker price suggests. If this mattress lasts 12-15 years, which the construction suggests it should, you're paying about $120-150 per year. That's not unreasonable for a quality sleep product.

The TENCEL cover, the zoned foam engineering, and the American manufacturing all add real cost. WinkBed isn't a discount brand cutting corners and marking up aggressively. The price reflects genuine material quality. That said, I wouldn't buy this again at this price without first looking at the Saatva Classic, which gives you a hybrid coil system, better motion isolation, and comparable pressure relief for $1,395. The GravityLux is excellent. It's not $400 better than a Saatva Classic excellent.

The 120-night trial is decent but not industry-leading. Some competitors offer 365 nights. The $49 exchange fee during the trial is a minor annoyance that becomes more significant if you're torn between firmness levels. The lifetime warranty is genuinely strong and adds real long-term value.

Bottom line on value: if you specifically need an all-foam mattress, if you prefer that slow-sinking feel and don't want coils, the GravityLux is probably the best version of that product you can buy. If you're open to hybrids, you can spend less and get more.

Sleep Position Breakdown

How It Stacks Up: GravityLux vs. The Competition

What Reddit Actually Says

Frequently Asked Questions