MISSION: ALLERGY brand encasings are specifically recommended by leading Allergy Specialists and university Allergy Departments. Designed by a Board-Certified Allergist. * Medical Grade. Blocks 100% of dust mite and animal dander allergens; third-party tested by Indoor Biotechnologies, Inc. Certified bedbug-proof. * Silky soft, tightly woven microfiber is air- and water vapor-permeable for comfort, yet water repellant. * Highest quality sewing construction: bound seams, interior and exterior zipper flaps, quality zippers. Lifetime warranty. * See Amazon link to Mission:Allergy, detailed seller information, for FAQs and recommendations by leading Allergy Specialists and periodicals