Mission Allergy Dust Mite and Allergen Proof Mattress Encasing-Twin

Per Manufacturer Website: The silky soft Premium Microfiber fabric of this mattress cover is strong but lightweight, and totally imperceptible beneath the sheets. With a mean pore size of only 2 microns, it allows free passage of air and water vapor, but prevents the escape of all allergens. Superior sewing features include bound seams, quality extra-long zippers, and interior zipper flaps. It is the ultimate in comfort, protection, and durability. Made in USA. Encases the whole mattress. Twin size 39"X75", 9" deep. Gently used by a child. Freshly cleaned-no stains or rips. Smoke-free home.