100% Gots Certified Organic Cotton100% GOTS CERTIFIED: This pillow encasement is made from Global Organic Textile Standard certified organic cotton ?? no added chemicals or treatments.ALLERGEN & DUST MITE-PROOF: It??s designed for people with dust and allergen sensitivity.COOL & COMFY: An average pore size of 4.9 microns and a 280-thread count help to keep you cool.ZIPPER COVER: This pillow protector has heavy-gauge nylon zipper tread and rust-proof metal zipper pulls.KING COVER: With your order, you??ll receive our 100% organic cotton king-sized zippered pillow cover.