Seaweed, which contains more nutrients than any other all-natural product, is the key ingredient used in PureCare Elements SeaCell™ pillowcase sets. Antioxidant-packed SeaCell technical textiles are derived from seaweed cellulose and woven into Halio pillowcase sets to nourish the body and skin. Our SeaCell pillowcases feature custom construction including a generous 8" pocket, allowing you to tuck your pillow securly into each pillowcase. PureCare's SeaCell pillowcase sets feature a cotton and SeaCell fiber sateen weave treated with antimicrobial silver chloride to inhibit bacteria, mold and mildew that cause deterioration, satins and odors on this product. Set includes 2 pillowcases.