Treat your little one to the natural mattress of their dreams! The Birch Kids Natural Mattress is a professionally endorsed mattress made with certified organic, hypoallergenic materials. This flippable natural mattress features a firmer side, for developing children ages 37, and a softer side for children ages 8-12. The Birch Kids Natural Mattress relies on organic wool as a natural fire retardant and is free from harmful gasses, formaldehyde, fiberglass, and polyurethane foams.