BedCare all-cotton barrier pillow encasement creates a soft, sealed barrier to allergens in your bedding. The 100% cotton fabric is so tightly woven that it blocks virtually all particles, even ones as small as pet dander. Doctors recommend that people who suffer from dust mite allergies or asthma cover their bedding to avoid breathing in allergens while they sleep. In addition, BedCare covers block bed bugs from getting through the zipper end once you have enclosed your comforter. BedCare cotton dust mite barrier covers are carefully cut and sewn in the USA by true craftsmen who know that the care they take in making each cover is important to your health. Standard 21"x27"; Queen 21"x31"; King 21"x 37"; Decorator 12"x16", European 26"x26".