AS3 View all Mattresses
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This mattress feels: Medium Learn more

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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. We combine our proprietary Bio-Pur™ and Affinity with SMT comfort layers to create a soft but responsive feel that relieves pressure points and makes you feel like you’re floating. Plus the high-performance Celliant® cover contains thermoreactive yarn to safely turn body heat into infrared. You'll love it, guaranteed.

This mattress feels


Perfect for

Side Sleeper
Combo Sleeper


  • High-Performance Celliant® Cover
  • Extra-Breathable cooling layer
  • Feels-like-you're-floating" layer
  • Sag-free & Eco-friendly Support
  • No flip, no turn design
  • Maintains consistent pressure relieving support
  • Compatible with an adjustable bed foundation

What we're made of

  • Celliant® infused cover

    Celliant® infused covers improve blood flow while you sleep to help you fall asleep and stay asleep.

  • Green Guard fire sock
  • 3" Bio-Pur memory foam (4.0 lb density / 10 ILD)
    Amerisleep Bio-Pur Memory Foam

    Bio-Pur is an extreme open cell memory foam that will react faster to your body so you'll never be stuck or feel hot.

  • 2” Affinity layer (1.5 lb density / 22 ILD)
  • 7" Bio-Core support layer (1.5 lb density / 35 ILD)

Quality assured

  • SFC Approved
    SFC Approved

    The Sustainable Furnishings Council is a non-profit balanced coalition of industry players founded to promote products designed to support environmental stewardship.

  • Made in the USA
We've got it all covered
And put just as much thought into what's inside.
Your mattress will be wrapped in a Celliant-infused cover. Celliant® is a thermo-reactive thread that has been clinically proven to help people fall asleep 15 minutes faster on average. It does this by using your natural body heat and recycling it into infrared light. This healing energy will help you wake up with more energy and less aches and pains.
Our large, open-cell memory foam will conform to your body while keeping you cool as you sleep. Since Bio-Pur™ is made with plant-based materials, we have lessened our reliance on petroleum. Bio-Pur™ excels at keeping you relaxed as you fall asleep.
Affinity layers transition between the other layers in the mattress to amplify their supportiveness and responsiveness. Your bed will feel softer while still supporting thanks to this layer.
The Bio-Core™ base layer provides solid support designed to preserve natural alignment without contributing to pressure points. Amerisleep's Bio-Core™ is composed of high-density material for comfort that lasts.
Sleep that's got your back.
And side. And stomach.

Buying a mattress online can seem risky, but with our guarantees you can put fear to bed. While we strive to match customers with the best mattress the first time, trying a mattress in your own home is the true test of comfort. If you are not satisfied with your mattress, ship it back to us within 100 days for a full refund.

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