100% aircraft composite helmeteffective, technical protection that doesnt leave aero performance and comfort in the dust, the aircraft composite helmet from 100% represents the ultimate blend in mtb for the ride of your life.dont let its lightweight construction fool you the protection on offer here is second to none, composite fibreglass keeping your head safe in the event of a collision, while the combination of emergency release cheek pads and a compartment for the use of inflatable emergency release systems allows for the helmet to be removed without the head being moved. The aircraft also boasts a wonderful fit thanks to the steel d ring buckle for security.elsewhere, theres plenty of ventilation thanks to the active cooling system that features 25 ports, and its not the only feature that keeps you feeling fresh on longer rides the liner, check pads and chin strap cover all feature an antimicrobial finish, which can be washed and replaced easily.featureslightweight design featuring a fiberglass composite shell.active cooling system maximizes airflow with a staggering 25 ventilation ports.antimicrobial, washable and replaceable comfort liner, cheek pads and chin strap coveremergency release cheek pads for quick, safe removal.integrated compartment accepts inflatable emergency release systems.compatible with most popular neck brace systems.steel d ring buckle provides a secure fit while limiting weight.perfect fit engineered with 2 shell sizes and 3 eps sizes and 4 cheek pad optionsadjustable visor with machined lightweight aluminum screws.buy 100% protection from chain reaction cycles. The world's largest online bike store.