This Allergy Pillow Cover is 100% hypoallergenic, designed to fit on any pillow, including memory foam contour pillows. The fiberfill cover zips closed over the pillow, and blocks dust mite buildup. The breathable, soft and cozy feeling of fiberfill means no more sweating nights, no more hair pulling. Lie down fresh and wake up fresher! Fiberfill is a high tech and premium quality material that blocks heat, maintaining your orthopedic pillow with a refreshing sensation. Great for people with sensitive skin or allergies. This dust mite cover is machine washable. Please Note: Due to the possibility of health risks, this item cannot be returned. *Important Note: This item is not returnable.* Assembly level/degree of difficulty: No Assembly Required.