The Naturepedic Breathable Organic 2-Stage Lightweight Crib Mattress is the only mattress of its kind that is breathable, waterproof and certified organic. This mattress features a firmer side for infants and a medium-firm side for growing toddlers. The design is strong yet lightweight, so it’s both easy for you to lift during late-night sheet changes and firm enough for your baby’s developing muscles and bones. GOTS certified organic and MADE SAFE® certified non-toxic, Naturepedic mattresses are made without flame retardants, formaldehyde, polyurethane foam or other questionable chemicals. When you choose a Naturepedic organic crib mattress, you’re choosing Safe Healthy Sleep™ for your baby.