Casper Dream Max Hybrid vs Amerisleep AS4

The best way to feel the Casper Dream Max Hybrid mattress is to take advantage of the 100-night, risk-free trial. It's the perfect mattress for those looking for a mattress that has a gooey yet supportive medium-soft feel.

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.

Casper ultimate hybrid mattress with precision-cut foam and encased coils. Engineered with a gooey yet supportive medium-soft feel perfect for any sleep style—especially side sleepers. For those who loved the Nova & Wave Hybrid.

Three layer construction:

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

Cozy Cover A buttery soft and airy knit blend is enhanced with added loft to make your mattress even cozier. Breathe+ Flex Foam A responsive and ultra-breathable open cell foam soothes you to sleep with enhanced airflow and the perfect bit of bounce. 20% more breathable than Breathe Flex 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.

Zoned Support™ Max Combines our firmer center foam with a second layer of precisely cut channels to cradle the natural curve of your body while adding support to your hips, waist, and lower back for the ultimate ergonomic relief. Over 2x the support zones as Zoned Support™. Hybrid Technology Premium foam continuously adjusts to your body while individually encased Flex Coils are designed to cradle 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.

* RESPONSIVE FEEL: An ultra supportive medium-soft feel with a little bit of bounce. * MOST BREATHABLE FOAMS: Ultra-breathable Breathe+ Flex Foam soothes you to sleep with enhanced airflow.

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.

* ULTIMATE ERGONOMIC SUPPORT: Firmer center foam plus a layer of precisely cut channels that cradle the natural curve of your body with seven support zones. * HYBRID TECHNOLOGY: Individually pocketed Flex Coils flex reduce motion transfer and boost support.

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.

* Top layer of breathable polyurethane foam. * Second layer of zoned polyurethane foam. * Third layer of contoured polyurethane foam. * (Hybrid) Durable base of polyurethane foam with encased springs.

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.

Free shipping and free returns, additional shipping fees apply to Alaska and Hawaii. Terms and Conditions apply.

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.