Amerisleep AS3 vs Casper Nova Hybrid

The AS3 is our most versatile mattress. It evenly blends support and softness, so it's great for people who change positions as they sleep and couples with different sleep styles. It's also our most popular mattress overall.

The best way to feel the Casper Nova Hybrid is to take advantage of our 100-night, risk-free trial. If you're looking for a mattress that can sustain more weight, or you want to be lifted more than cradled, then our hybrids are a great choice.

Three layer construction:

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

Those who want a plush top layer without sacrificing support and cooling. Made with three layers of premium foam, plus foam-encased springs:

• Breathable AirScape™ Polyurethane Foam
• Zoned Polyurethane Foam
• Contoured Memory Foam
• Durable Base of Polyurethane Foam with Encased Springs.

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.

Cooling helps keep you at the right temperature for your best. Two layers of perforated breathable foam help reduce heat. Plus every mattress saves up to 70 recycled bottles from the environment.

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.

Superior plushness without sacrificing support. More support where you need it most with the plushness you crave. Zoned Support™ Pro offers 7 zones of targeted support for healthy spinal alignment, softer foam around the shoulders provides more relief to the upper body and multiple ergonomic points under shoulders, hips, waist and lower back.
A firmer border provides edge support to help you get in and out bed easily.

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.

A top layer of proprietary perforated breathable foam helps reduce heat, the tiny holes move hot air and body heat away. With a thin coating of cooling gel that adds a refreshing feel. This innovative cooling system is designed to help keep you cool all night.
Second layer of AirScape™ helps prevent overheating. These air channels allow heat to escape.
Resilient springs increase airflow.

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.

Premium AirScape™ foam conforms to your body to relieve pressure. This has a plush, velvety soft feel.
A second layer of supportive foam has 3 ergonomic zones to help align your spine and provide more relief.
A third layer with Zoned Support™ Pro relieves pressure under the shoulders, and provides more support under the waist, lower back, and hips to align your spine. These zones reinforce support from the layers above.
Fabric-wrapped springs provide active support and a little lift.

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.

A super plush and stretchy top. This velvelvety-soft layer makes bedtime feel extra cozy. Knit fabrics stretch in 4 ways so you feel the full benefits of the layers below. The added pillow-like fabrics cradle your body and make you feel as if you were sinking into a cloud.

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.

Fast, free shipping and free returns with every order. We ship in the United States and Canada from warehouse partners in each country. Additional shipping fees apply for Hawaii and Alaska.