The AS3 mattress from Amerisleep is an extra thick 12-inch memory foam mattress, which packs a ton of excellent features but comes at a high price tag because of the extra thickness. For heavyset people, the extra thickness can make a significant difference in the lifetime and comfort of the mattress, especially since the thick seven-inch base foam layer is specifically designed to prevent sagging over time.
The firmness of the mattress is described as medium, although users found that the mattress was very firm and most required at least a mattress topper to sleep comfortably. The top two layers of foam are both designed to be responsive to your body, and together provide the feeling of floating on top of the mattress so that there are few pressure points. The mattress cover is infused with Celliant technology, which improves blood flow and is intended to help you fall asleep faster and wake up feeling refreshed.
Amerisleep offers a 100-night sleep trial for this mattress, and users found that they have excellent customer support throughout this trial period. Over the long term, they provide a 20-year warranty on the mattress, although thanks to the thick and durable construction problems are unlikely to arise.
