Specs on the helmet: Aerodynamic Shell Design - The Shoei uses 4 shell sizes, and 5 sizes of EPS liners to acheive the BEST FIT POSSIBLE - Aerodynamic properties are maximized through extensive wind tunnel and rider testing - The Aero Edge Spoiler dramatically reduces drag and lift coefficients, thus diminishing rider fatigue and increasing performance Hyper Dual-Liner II Ventilation System - Offers unmatched ventilation with internal channels and exhaust ports throughout the helmet - The Dual Air Charge system: A forehead lower intake and a forehead upper "Air Scoop II", combine to maximize flow-through ventilation - Outlet holes in the Aero Edge Spoiler allow warm air to be exhausted - The lower air intake provides an additional source of air flow - The neck outlet vent allows for effective air exhaust Llightweight AIM+ (Advanced Integrated Matrix Plus Multi Fiber) - High performance fiber materials are combined with extremely elastic organic fibers to create a shell structure that is ultra lightweight, rigid and resilient Anti-Fog System - Exhaled air is absorbed into the "Breath Chamber II" and exhausted by negative air pressure, thus eliminating shield fogging - The lower air intake provides air flow that helps to diminish shield fogging 3D Full Support Interior, Type 3 - The entire interior lining (cheek pads, upper liner and chin strap covers) is easily removed to allow for cleaning and/or replacement - Each component of the inner liner is ergonomically designed to offer safety, fit and comfort Standard Chin-Strap Clip - Neatly secures the end of the chin strap CX-1 V Shield and Lock System - Q.R.B.P. (Quick-Release Base Plate) allows for tool-less shield removal - A wide, three dimensionally curved shield offers increased peripheral vision and optical clarity - Scratch-resistant coating - 99% protection from harmful UV A & B rays - A pre-set lever can easily lock the shield in place to prevent it from opening unexpectedly - Shield cleaning kit included Technical Information Standards: DOT 218, Snell-M2005 Contruction: AIM+ (Advanced Integrated Matrix Plus Multi Fiber) materials Weight: 3.35 lbs / 1520 grams (approx, based on size Medium Solid Color) 5 YEAR WARRANTY Watch The Shoei X-Eleven Helmet Video Review Below http://sportbiketrackgear2.homestead.com/Shoei_X11_Video_Part1.html http://sportbiketrackgear2.homestead.com/Shoei_X11_Video_Part2.html