Why shoppers chose it
By Amerisleep
The retired 12-inch Amerisleep AS4 used 4 inches of Bio-Pur Memory Foam, 1 inch of Affinity foam with HIVE zoning, and a 7-inch Bio-Core base for a medium-soft feel; Amerisleep now redirects its former AS4 URL to AS3.
Archived model
No current manufacturer listing or verified inventory was found. This page remains for historical reference.
Height: 12"
Firmness: Medium-soft (retired model) · 3.5/10 feel reference
On the feel scale, 1 is softest and 10 is firmest; feel can vary by body type and sleep position.
Construction: memory-foam
Owned the Amerisleep AS4? Tell other shoppers what you think.
Retired-model decision guide
Amerisleep no longer presents AS4 as a current mattress: its former product URL redirects to AS3, and the current lineup moves from AS3 to AS5. AS3 and AS5 are the practical current choices, but neither is the same mattress under a new name.
Retired AS4
Amerisleep's archived specification described 4 inches of Bio-Pur memory foam, 1 inch of Affinity foam with HIVE zoning, and a 7-inch Bio-Core base.
That unusually deep comfort layer was the reason to choose AS4: more shoulder and hip contour than AS3 without going to the taller, softer AS5.
Current Medium choice
$1,149 Queen
Choose AS3 when you wanted AS4's 12-inch all-foam format but prefer a more balanced surface and broader side, back, and combination-sleeper fit.
AS3 uses Bio-Pur comfort foam, HIVE zoned support, and a Bio-Core base. It is the closer current choice for shoppers who do not want Amerisleep's softest feel.
Current Soft choice
$1,749 Queen
Choose AS5 when the reason you wanted AS4 was deeper shoulder and hip cushioning for side sleeping.
AS5 is a 14-inch design that adds responsive Active Flex between its Bio-Pur comfort foam and HIVE support system. It is softer and taller than the retired AS4, so it is an alternative rather than a renamed replacement.
AS3 is currently labeled Medium; AS5 is labeled Soft. An existing AS4 owner seeking the same medium-soft calibration should treat both as alternatives and use Amerisleep's current 100-night trial, including its requested 30-night adjustment period, to judge the replacement.
AS4 facts above describe the retired model from Amerisleep's archived first-party material. Current AS3 and AS5 descriptions and prices come from their current product records. Shopping links are affiliate links; SleepRanked may earn a commission at no extra cost to you.
