Now your baby can get the same benefits found in our Simmons Perfect Slumber full size crib mattress with chemical free organic cotton in a size to fit your mini crib! Organic cotton is grown without the use of chemicals and pesticides for a healthier sleep environment. The extra firm heat bonded lightweight core is made from 100% recycled polyester fibers that allow the core to breathe and air to flow through. Combined with the breathable organic cotton cover this mattress gives your baby a healthy sleep environment at the perfect temperature.