Utopia Bedding Zippered Bamboo Pillow Cases - Pack of 2 - (King, White) - 300 Thread Count Pillow Cover - 100% Natural Pillow Protector - (20 by 40 inches) - Bamboo Sateen Pillow Encasement 20 by 40 inches - Includes pack of 2 zippered pillow cases; pillows are sold separately Advanced bamboo sateen fabric with 300 thread count provide extremely soft, cool and smooth feel against your skin unlike polyester Additional cloth piece on zip top provides safety and comfort; blocks mold spores, dust mites and other allergens that may collect in your pillow covers Free of allergens, synthetics and chemicals cover helps relieve asthma and other respiratory conditions Need occasional cleaning to remove dust, sweat, and oil buildup; machine wash on cold, tumble dry on low