Brand new sleep number king sheet set - supremi cotton ct flat fitted sheet top sheet, pillowcases. Mocha color Our finest cotton sheets are exceptionally soft and durable, made from responsibly sourced 100% Supima cotton for long lasting comfort. Pillowcases included. Supima cotton is a rare, superior type of cotton grown in the USA. It represents less than 1% of the cotton grown worldwide. Its extra-long staple fibers are strong and soft with excellent color retention. They resist pilling, breaking and tearing, for incredible resilience and long-lasting quality. ExactFit™ sheet design allows our sheets to stretch and move with our unique smart beds as they flex, and recover between uses, for a smooth, perfect fit.