Pristine Luxury Dust Mite Pillow Cover - Standard 21x27 100% Prestine Polyester Pristine Luxury zippered pillow cover completely encases your pillow Soft, cool, breathable and comfortable. Effective against all allergens Made to Last - Covers are sewn with a double stitch and at least 12 stitches/inch Machine Washable / Tumble Dry / No Ironing Made In USA, Life Time Warranty!