Martha Stewart Allergy Wise Skirted King Fiberbed Mattress Topper 100% Cotton Cover, 100% Polypropylene Back, 100% Polyester Skirt, Hypoallergenic 300 Thread Count Cover, Antimicrobial Treated Fill--Inhibits the growth of bacteria on fiberfill Antimicrobial Treated Fill--Inhibits the growth of bacteria on fiberfill MSRP $240.00