Amerisleep AS4 vs WinkBeds GravityLux

The AS4 is our medium-soft mattress. It offers plush comfort with targeted support that helps you sleep your best. Plus it stays cool all night, making it our most popular model with side sleepers.

The GravityLux by WinkBeds is available in 3 different firmness options:

• GravityLux SOFT, a 4/10, is designed for sleepers with a preference for a plush comfort level. Great for those who sleep on their side or if you simply prefer an overall softer feel.
• GravityLux MEDIUM, a 5/10, our most popular comfort level and the "just right" spot for our choosiest customers who like a medium feel. Not too firm and not too soft - it's a fit for all sleep positions and body sizes.
• GravityLux FIRM, a 7/10, is designed for sleepers with a preference for a firmer comfort level. Great for those who sleep on their stomach or back and also enjoy an overall firmer feel.

Three layer construction:

• Bio-Pur® foam
• HIVE® transition layer
• Bio-Core® foam support layer
• Refresh Cooling Cover.

Designed to exceed the performance of fine luxury hotel mattresses and $4,000 in-store brands, the GravityLux Medium is constructed with the following layers:

• TENCEL® Cover
• 2 Layers of Gel Infused Foam
• AirCell™ Memory Foam
• Zoned Progression Foam™
• ATLAS Core™ Foam.

Traditional memory foam is made from dense material, so it traps your body heat and can make you sweaty and uncomfortable while you're in bed - and who can sleep like that?
We developed our foam with an enhanced "open cell structure", which means there is more air space between the foam particles. That space wicks away heat while you sleep, and can keep you cooler and more comfortable.

Each tiny cell acts like an individual shock-absorbing cushion, releasing air independently as pressure increases, and ensuring individualized comfort and support.

Our Bio-Core® foam support layer won't sag even after decades of use. And, like our Bio-Pur® foam, it's partially made from plants instead of petroleum so it's eco-friendly.
The HIVE® layer features hundreds of foam hexagons grouped into five comfort zones. Each zone is designed to provide extra cushion where you want it and support where you need it. That way your body gets the support it needs to stay properly aligned, so you can sleep your best.

The GravityLux features 7 progressive layers of support, relieving pressure through the hips and shoulders and providing enhanced support through the lumbar and lower back. We achieve this through a proprietary foam texturization and fabrication process.
Each shock-absorbing air capsule moves independently to each other, quickly absorbing motion from a restless partner, and effectively stopping movement transfer to other parts of the bed.
AirCell™ has an open-cell structure of billions of micro air capsules that comfortably mold to your body weight, keeping your muscles relaxed and joints aligned.

The HIVE® transition layer has precision-cut channels that carry away even more heat and moisture. It's enough to make you feel like you're weightlessly resting on a cloud.
Amerisleep's Bio-Pur® material features an advanced-open cell design. This makes Bio-Pur® more breathable and responsive than memory foam, which will keep you cool and comfortable all night. Plus we make Bio-Pur® from partially plant-based sources using a zero-emission process. That means it's the most eco-friendly material of its kind.

Unlike traditional memory foam, AirCell™ isn't temperature sensitive, and dissipates body heat faster. It draws heat from your body, dispersing it throughout the mattress to keep you cool.

Bio-Pur® contours to your body to relieve pressure points and bounces back fast, so you won't feel "stuck" during the night.
Our HIVE® transition layer provides targeted support and pressure relief so you can sleep in perfect alignment. It gives your head, back, and legs more support, and your shoulders and hips more cushion.

A two-layered Gel Foam top ensures your back, hips and shoulders get exactly the right level of cushioning and support, easing stress and muscle tension.
AirCell™ Memory Foam: with revolutionary pressure relief and contouring, pushback body support in varying zones, AirCell™ Foam is designed to relieve pressure and target support where you need it most.
Zoned Progression Foam provides targeted support in 5 zones with varying firmness levels: firmer support in the hips and lumbar region, softer in the shoulders and legs.

Refresh Cooling Cover
The Refresh Cover draws heat from your skin for a delightfully cool-to-the-touch feel. On average, your sleeping surface will stay 7 degrees cooler over an eight-hour night of rest compared to a traditional 100% polyester cover. This scientifically engineered fabric uses minerals to help convert your natural body heat into far infrared energy. This type of energy increases blood circulation to help speed up muscle recovery and improve quality of sleep.

Sleep cool and dry with our Eucalyptus-derived TENCEL® cover. Tufted with 2" of premium cooling gel foam inside, it enables airflow and wicks away body heat and moisture.

We provide standard free curbside shipping to anywhere in the contiguous USA. Mattresses ship as quickly as 3-5 working days (excluding major holidays) via FedEx, once shipped, delivery takes approximately 1-5 business days.

It takes about 2 weeks to receive your mattress from the time you place your order. The first 3 to 5 days are dedicated to manufacturing your mattress fresh to order. Once the mattress ships out and reaches your local area, our delivery team will contact you to schedule a delivery day.