Pristine PREMIUM Allergen Proof Queen Pillow Cover 21'' x 31'' Scientifically tested and proven to protect against dust mites and bed bugs Anti-microbial treatment to inhibit mold and mildew growth Oeko-Tex Certified to be free of harmful substances that can irritate skin 248-thread count, 100% polyester microfiber provides a supple, cotton-like feel YKK zipper and flaps at the zipper area to further block allergen particles. Comes with a Lifetime warranty, & made in the USA