Fresh Slumber Performance Sheet Set, King, Sage 400 thread count sateen fabric made from 80% cotton and 20% polyester Includes 1 flat sheet: 108x102-inches; 1 fitted sheet 78x80-inches; 2 king pillowcase: 20x40-inches Reduces humidity for drier sleep and more comfortable nights Single needle hem Machine washable and tumble dry Questions/Comments? Please call our customer service number directly at 888-288-8781.