Shoei Kagayama 4 X-Twelve Street Bike Racing Motorcycle Helmet - TC-2/X-Small

SHOEI is a Japanese company that produces a popular line of motorsport helmets. Has been dedicated to the development of superior helmet technology and all helmet parts. The demands that a world-class racer puts on his or her equipment may be second to none, but that hasn't stopped SHOEI from producing a pure racing helmet that can also meet the needs of today's performance-driven enthusiasts. Born from racing, the X-Twelve combines integral feedback from professional racers around the globe with SHOEI's 50 years of helmet building experience, the very latest in technology, and the most advanced materials known to man. Track certified by the fastest riders on the planet, the X-Twelve's innovative features unite to form the most progressive racing helmet on the market. Q.R.S.A. (Quick Release Self-Adjusting) Base Plate System. CW-1 Shield. AIM+ Shell Construction. 5 Shell Sizes. Aero Edge 2 Spoiler. Ventilation System. Dual-Layer EPS Liner. 3D Max Dry Interior System. Chin Curtain. Breath Guard. 5-Year Warranty. 2014 Model. DOT approved. Meets the FMVSS 218 Standard. Sizing Note: X-Small - Hat Size: 6 5/8 - 6 3/4 - Centimeter: 53 - 54 - Inches: 20 7/8 - 21 1/4 Small - Hat Size: 6 7/8 - 7 - Centimeter: 55 - 56 - Inches: 21 5/8 - 22 Medium - Hat Size: 7 1/8 - 7 1/4 - Centimeter: 57 - 58 - Inches: 22 1/2 - 22 7/8 Large - Hat Size: 7 3/8 - 7 1/2 - Centimeter: 59 - 60 - Inches: 23 1/4 - 23 5/8 X-Large - Hat Size: 7 5/8 - 7 3/4 - Centimeter: 61 - 62 - Inches: 24 - 24 3/8 2X-Large - Hat Size: 7 7/8 - 8 - Centimeter: 63 - 64 - Inches: 24 3/4 - 25 1/8.