The Serta PerfectSleeper Allergy Smart pillow protectors are made of a soft plush fabric and provide protection against household allergens. Available as a 2 Pack in both Standard/Queen and King sizes # Pieces In Set: 2 Features: Allergen Barrier Bedding Closure Type: Zipper Thread Count: 300 Pillow Size: King Measurements: 36 Length/Inches, 20 Width/Inches Base Material: 100% Polyester Care: Machine Wash Pillow & Cushion Covers Type: Pillow Protectors Country of Origin: Imported