Twin Extra-Long 600 Thread Count Wrinkle Resistant Cotton Sheet Set - White Cotton 600 Thread Count 100% Cotton Rich = 55% Cotton and 45% Polyester A superior blend of materials makes these sheets soft, easy to care for and wrinkle resistant. Fitted sheet pocket depth: 15" inches fits up to 18" 3 Pc set includes - (1) Fitted 39"x80", (1) Flat 66"x100", (1) Pillowcase 20"x30"