With stretchability and durability better than other materials like Egyptian-quality. It will retain shape longer than cotton and spring back well after washing. Use a state-of-the-art fiber filler that has the feel of authentic goose and duck down without the feathers, poking, or allergies. The filling makes this mattress pad more skin-friendly. The deep pocket design easily stretches to fit mattresses thick. And fully-elasticized fitted sheet style easily pulls in the border to ensure a great fit and stretch.