White Loft Sandwashed Silk Open End Pillowcase, King, White, Set of 2 16 natural amino acids in the silk help prevent wrinkles and split ends 100 Percent naturally hypoallergenic silk repels dust mites and eliminates mold and mildew that may aid reducing morning allergy symptoms Hydrogen peroxide is the only cleaning agent used in manufacturing,creating a healthy, dye-free sleeping environment Classic cut and style that matches White Loft sheets and duvet covers Set of 2 king size pillowcases; each measures 20 by 40 inches