The organic crib mattresses by NaturalMat are not only 100% natural but are also breathable, hypo-allergenic, anti-dust mite and naturally fire-retardant all while providing superior support for your tired (or not so tired) baby.   Organic cotton is used for the mattress cover. Coconut husks ensure a firm yet surprisingly springy support while the wool padding provides thermal insulating properties to help baby drift off into dreamland.