Protect your baby from hard crib rails with this breathablebaby portable crib & cradle liner. It has polyester fill with a thread count of 220 that's gentle against your little one's delicate skin. This baby bedding item is designed to fit most cribs and has a thickness of 0.13". This baby bumper received the national parenting center seal of approval in 2008. Color fast, hypoallergenic and pvc-free. Machine wash.