The Polysleep Sierra from Polysleep is a foam mattress with a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
Inside the Polysleep Sierra
Polysleep Sierra
9" tall
Polysleep · Foam · Firmness 6/10
Hover or tap a layer to slide it out
Layer breakdown
Polyfoam comfort layer
2″ thick · 3 lb/ft³ density
Measured at 3 lb/ft³ — high-density foam like this resists softening and body impressions, one of the strongest longevity signals in a build.
Polyfoam support core
7″ thick · 1.5 lb/ft³ density
Measured at 1.5 lb/ft³ — solid polyfoam for average-weight sleepers, though heavier (200 lb+) sleepers would want closer to 1.8 lb/ft³ here.
Hover or tap a layer to see what it means for comfort and durability.
Total height9"
What it does well
Excellent pressure relief at the shoulders and hips
