The Foamology NuFoam Pad is a safe alternative to conventional foam, and is made from densified polyester batting. It is mildew resistant, non-allergenic and won't yellow or disintegrate. This pad is perfect for chair cushions, deck furniture, camping, futons, crib bumpers, playpen mats, recreational vehicle accessories and more. It is made from compressed layers of 100% polyester that are 1 inch to 4 inches thick. The pad works best for occasional seating as it will compress over time. Use a pad that is 1-inch thicker than your intended cushion to allow for compression. It will be a snug fit inside the cover.