Featuring Impact�s unique �Ripple Effect� aerodynamic modeling and lightweight construction, the design of the Carbon Fiber Vapor helmet provides added stability to accommodate high-speed airflow while Impact�s integrated venting and air circulation system provides cooling comfort. In addition to our exclusive �Intelligent Gray Matter� liner (a single-piece, variable-density liner) the Vapor helmet features a fire retardant soft-knit Nomex� interior and interchangeable cheek pads provide a customized fit. Integrated crown and chin bar vents provide fog free ventilation keeping you cool and comfortable all race long. The Impact Vapor is finished with a fire-retardant Kevlar� chin strap with dual D-Ring closure and our 1/8� polycarbonate shield with three-position detent. Adult Sizes: XS/S/M/L/XL