The Skull Cap is cut into 5 panels and sewn into a headwrap, with a tail and ties at the nape of the neck. It is designed to sit securely on the head using the attached ties, allowing one size to fit all. Skull Cap head wraps are great under a helmet as a moisture barrier as they help to isolate grease and sweat from helmet liners. Tail protects neck from the sun. One size fits most.