This hypoallergenic down alternative mattress pad lets you feel like sleeping on warm fluffy clouds, made with 100% polyester plush that's ultra-soft and overfilled-adding extra warmth and loftiness for coziness on cold nights. It's waterproof to ensure lasting comfort and durability, and features a box-quilted design that keeps the fill evenly distributed, so you won't have lumpy spots.Its deep pocket knit skirt stretches to fit mattresses up to 18 inches thick, and it's OEKO-TEX certified-free of harmful substances or chemicals-for safe, quality comfort. The pad is also machine washable for easy care; plus, placing a fitted sheet over it helps keep it clean and prevents sliding or clumping at night.It comes efficiently compressed in one box for easy shipping: just unbox and unroll it, and it will expand to its original shape within 72 hours, making setup hassle-free. Material: Foam.