Design Weave Outlast All Season Temperature Regulating Waterproof Mattress Protector Bundle, Twin Cotton 300-thread count, 100% Cotton Cover Outlast Certified Gold Liner Polurethane backing and five sided protection make this completely waterproof. Outlast technology absorbs, stores & releases heat Balances temperature around your body and maintains optimal sleep temperature. Provides thermal compatibility with your partner Hypoallergenic construction to resist dust mites and other allergens Includes: 39 x 75in Mattress Protector, 1 Standard Pillow Protector 21 x 31in Questions/Comments? Please call our customer service number directly at 888-288-8781.