The Oakley SI (Standard Issue) Cap is a high-quality, stretch fit cap with a hook and loop patch and center front embroidery. Made of 100% polyester, it offers a comfortable and secure fit with a circumference of 56cm for S/M and 58cm for L/XL. The side panel measures 16.7cm, giving you ample space for custom patches or embroidery. Stay comfortable and stylish with this practical cap.