Tips: It’s Packaged in a Vacuum Bag, Wash &Dry Or Spread It for a Few Days Before Use So It Would Return to Normal Thickness.(best Way Fluffy Again: Lay It in the Sun for a Few Hours.) Breathable and Ultra Soft: With the new HNN Cooling Technology, the cloud-like surface, made of 300TC 100% cotton, gives superior comfort without extra heat and sweat. Compared to the normal diamond quilting seam, this one with new shape is more supportive and soft. Healthier Sleep: Filled with snow down alternative fill, a state-of-the-art fiberfill that has the feel of authentic goose and duck down without the feathers or poking, this mattress pad can keep your mattress free of stains,offering sweet nights.