Slip into something more comfortable, Oki? When you are ready to turn in for the night, the sheets you’re tucking into can make all the difference. The Sleepy Sheet and Duvet Set includes a flat sheet, fitted sheet, two pillowcases, and a duvet cover. King and CAL King sets include King size pillowcases. Made from 100% organic cotton, these heavenly sheets are soft, comfy, and cool.