The Jupiter Health Assure Deluxe Organic Mattress offers 2-in-1 firmness with an infant side that is more supportive, and a softer toddler side for added sleep comfort. The mattress exterior is 100% Certified Organic Cotton. Also, the mattress comes with a 100% Certified Organic Cotton cover that is waterproof and pesticide free, so your baby will sleep in natural comfort. The inside of the mattress is comprised of a lightweight high density foam core. One side is extra firm for infants and the other is memory foam which is great for toddlers as they grow. The lightwweight core makes it easy to change the crib sheets. Made in Canada and covered by a Lifetime warranty against manufacturer's defects.