Shoei Qwest Neuron Helmet Aerodynamic Shell Design Aerodynamic properties are maximized through extensive wind tunnel and professional riders feedback Dual Layer EPS liner enhances impact absorption and ventilation Five shell and six EPS liner sizes present increased fit options that help to comfortably fit most head sizes Molded air spoiler to reduce drag and lift as well as diminish weight pressure on the neck while riding at high speeds Ventilation System Upper Air Intake Vent is positioned to maximize air volume into the helmet interior Large upper intake vent positioned to maximize performance in high wind conditions Easy to operate large lower intake vent Lower air intake/defroster vent reduces shield fogging and increases ventilation The rear/neck outlets allow for effective air exhaust Breath guard and chin curtain included Lightweight Advanced Integrated Matrix Plus (AIM+) High performance fiber materials are combined with extremely elastic organic fibers to create a shell structure that is ultra lightweight, rigid and resilient Interior System 3-D center pad and multi-layered, polyurethane foam cheek pads Cheek pads are replaceable or removable for maintenance Eyeglass compatible interior Standard Chin-Strap Clip Neatly secures chin strap CW-1 Shield and Q.R.S.A. System Q.R.S.A. (Quick-Release Self-Adjusting) base plate allows for tool-less shield removal and installation. The spring-loaded base plate (U.S. patent pending 11/799935) pulls the shield back to contact the window beading evenly and ensures a proper seal Scratch-resistant coating 99.9 protection from harmful UV A and B rays Optional, CW-1 Pinlock prepared shields are available to accommodate Pinlock Fog Free Inserts The CW-1, three-dimensionally curved shield is both wider and taller than the CX-1V it replaces Optional, CWF-1 two-dimensional Pinlock equipped racing shields with tear-off posts are available A pre-set lever can easily lock the shield in place to prevent the shield from opening unexpectedly, as well as prop the shield open to increase airflow Additional Specs Construction AIM+ (Advanced Integrated Matrix Plus Multi Fiber) Weight 3.644 lbs / 1,653 grams (approx, for Size Medium Solid Color) Standards Snell-M2010, DOT