Oakley Men's SI MK 2 Mod 1 Standard Issue Tactical Fitted Hat Cap - Black Stretch fit unstructured hat Performance poly mesh fabrication Front hook and loop morale patch panel with subdued ellipse embroidery Hydrolix headband S/M: US Hat 6 7/8 - 7 1/4. L/XL: US Hat 7 1/4 - 7 5/8