The Ultra Organic Cotton Crib Mattress offers impressive support, waterproof material, with a long-lasting and extremely soft organic and natural cotton cover with 252 coils, which all creates an amazing night’s slumber for baby. Crafted from non-toxic, allergen-resistant and easy-clean materials, the Naturepedic mattress is manufactured in the USA, with square corners for a tight fit. This mattress is unique in that it makes use of coils as opposed to foam, making the crib mattress denser, unlike foam mattresses. Featuring two sides, one for infants and the other for toddlers, as the toddler side is much softer and accommodates the toddlers size and weight.