The Swoosh Flex Sized NCAA cap from Nike Team Sports for the Oklahoma Sooners is made from a 97% cotton/3% spandex brushed twill and is a structured stretch-to-fit cap, with a 3-D school logo embroidery at the center front, a Nike Trademark Swoosh embroidery on the left side panel, and the mascot name on the back. This one size fits all cap will fit sizes 6 7/8-7 5/8.