Poly-Fil NU-Foam is a safe alternative to conventional foam that is made from densified polyester batting. It is mildew resistant and won"t yellow or disintegrate. It"s perfect for chair cushions, deck furniture, camping, futons, crib bumpers, playpen mats, recreational vehicle accessories and more. Made from compressed layers of 100-Percent polyester that range from 1" to 4" thick. Poly-Fil NU-Foam is a safe alternative to conventional foam that is made from densified polyester batting. It is mildew resistant and won"t yellow or disintegrate. It"s perfect for chair cushions, deck furniture, camping, futons, crib bumpers, playpen mats, recreational vehicle accessories and more. Made from compressed layers of 100-Percent polyester that range from 1" to 4" thick.