Amazon Basics Memory Foam Mattress, Medium Firm, 8 Inch, Twin ashley-mattresses Stacking more than two adapters

Stacking more than two adapters is not recommended and can void the warranty of your base

Extra-deep pockets for mattress depths 6 to 22 inches

They're breathable

Shipped to Your Door | Compressed

1 inch of slow recovery foam (to reduce the bouncing effect of foam and springs)

Amazon Basics Memory Foam Mattress, Medium Firm, 8 Inch, Twin ashley-mattresses Stacking more than two adaptersBrand: Amazon Basics Color: White Grey Edition: Medium Firm Features: General Note: Please allow 24 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state. The expansion time of the mattress will vary as per the surrounding Twin size measures 75 x 39 x 8 inches (LxWxH); mattress