puredown Mattress Pad, Twin, White Shell: 100% Cotton. Stuffing: 100% Polyester Down alternative mattress pad's inner filling consists of 100% premium hypoallergenic fiber. This mattress pad can help users who are allergenic to down and feather fall asleep faster Constructed with a water resistant design, box quilt pattern, 500 thread count top,180 thread count bottom Inner Filling: 100% Polyester Item size: 39*75*15" Mattress pad will be packed in a sealed PVC bag during delivery Down-alternative mattress pad wont trigger down-feather allergies,recyclable and environmental-friendly,and can be safely and easily machine washed at home. For easy home care, simply machine wash warm and tumble dry low. From one cleaning to the next, this mattress remains wonderfully soft and fluffy