A mattress takes so long mainly because new foam must off-gas its VOCs before it smells neutral, and your body then needs weeks to adjust to a different firmness and support.
Mattress timing
Why does mattress take so long?
The delay also starts before delivery. Over 300 mattress brands sell on Amazon, and buyers must settle on a type (foam, innerspring, or hybrid) and a firmness for their sleep position before comparing any of them. Compressed foam mattresses then need time to expand and air out once unboxed.
- Over 300 mattress brands currently sell on Amazon with estimated sales, from single-model sellers to multi-line brands.
- The 10 largest mattress brands take 56% of estimated category sales, leaving hundreds of smaller brands competing for the rest.
- Memory foam mattress off-gassing releases VOCs, which can irritate the airways until the smell fades.
- CertiPUR-US certification caps total VOC emissions at 0.5 ppm, a listing detail that signals lower off-gassing.
- Side sleepers generally prefer soft to medium mattresses, while stomach and back sleepers prefer medium to firm.