Sleep Safe ZipCover LuxGuard Bed Bug, Dust Mite, and Allergen Proof Mattress Encasement / Allergy Protector Zippered Cover / Long Twin 9 Inches Microfiber advanced technology in a high performance woven fabric to filter out small allergens Soft, lightweight and breathable for the ultimate in comfort in a zippered mattress cover Dense weave and fewer seams make this encasement strong and durable for lasting protection 6 sided zippered encasement, with L-zipper construction, provides as a allergen, dust mite, and bedbug barrier Made in the USA, hand inspected to ensure quality; durable for repeated washing