best foam mattresses

Common thicknesses vary by use: crib and toddler foam mattresses are typically 5–6 inches thick; most all-foam adult options run about 6–8 inches; and the hybrid option in this set is listed at 14 inches.

Expansion times vary by model but commonly fall between 24 and 72 hours. Several listings recommend waiting 24–48 hours and some note up to 48–72 hours for full expansion before regular use.

The listings show several foam types: high-density polyurethane foam, memory foam (including gel-infused memory foam), and at least one model with a green tea–infused base foam.

Child-focused foam options are often described as firm; several crib/toddler mattresses are dual-sided with a firmer infant side and a softer toddler side. Adult foam mattresses are commonly labeled medium-firm or medium.

Crib and toddler foam mattresses are typically 5 or 6 inches thick and are usually described as firm. Several listings use a dual-sided design with a firmer infant side and a softer toddler side.

Listings note compatibility with metal bed frames, box springs, platform or slatted frames, bunk beds, and floor use. At least one adult foam model also states compatibility with an adjustable base.