The Amerisleep AS3 from Amerisleep is a memory foam mattress with a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
Inside the Amerisleep AS3
Amerisleep AS3
12" tall
Amerisleep · Memory Foam · Firmness 5/10
Hover or tap a layer to slide it out
Layer breakdown
Memory foam comfort layer
3″ thick · 3.3 lb/ft³ density
Measured at 3.3 lb/ft³ — solid memory foam for average-weight sleepers, though heavier (200 lb+) sleepers would want closer to 3.5 lb/ft³ here.A memory-foam layer this thick tends to hold body heat — worth knowing if you sleep hot.
Polyfoam transition layer
3″ thick · 1.7 lb/ft³ density
Measured at 1.7 lb/ft³ — solid polyfoam for average-weight sleepers, though heavier (200 lb+) sleepers would want closer to 2 lb/ft³ here.
Polyfoam support core
6″ thick · 1.8 lb/ft³ density
Measured at 1.8 lb/ft³ — clears the ~1.8 lb/ft³ durability bar we'd hold polyfoam to even under heavier (200 lb+) sleepers.
Hover or tap a layer to see what it means for comfort and durability.
Total height12"
What it does well
Excellent pressure relief at the shoulders and hips
Isolates motion well, so partners barely feel each other move
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