Cotton/lycra outer with hidden poly fleece. Lining of cotton/polyester velour (80% cotton/20% polyester) and light sewn in soaker. Snap in soaker consists of layers of super heavy bamboo/organic cotton fleece and hemp/cotton fleece topped with a layer of cotton velour. Rise adjusts with snaps in the front . Made in the USA. Machine wash cold to warm water and tumble dry low or line dry. No bleach or fabric softener. Fits babies from approximately 9-35 pounds.