The Concour is a low profile helmet made with in mold technology for an extremely lightweight and functional fit. Vertically anchored retention system with a fully adjustable dial for an easy custom fit with the turn of the dial. Removable cushioned headliner for easy care. Multiple mesh covered vents helps keep out dirt and debris while allowing maximum air flow. Four point nylon harness system with a quick release heavy duty snap buckle. Suede and nylon covered shell prevents scratches and adds a stylish flair. Black & Brown. Small- 20"-21 1/4" ( 6 3/8- 6 3/4); Medium- 21 1/4"- 22 3/4" ( 6 3/4- 7 1/4); Large-- 23 1/8"- 24 3/4" ( 7 3/8- 7 7/8) SEI certified to ASTM F- 1163-04a.