Here at TLD, styling, graphics, fit, function and safety are key in everything we create. After years of research and development, the Troy Lee Designs Team introduced the A1 helmet in 2013. This lightweight, fully encapsulated all-mountain helmet utilizes maximum coverage and dimension to keep you safe and protected in all riding conditions. Whether you're charging singletrack, riding dirt jumps or grinding out miles on the XC bike, the A1 helmet offers the premium fit, protection and style you want.EPS impact liner maximizes impact protection while minimizing weight. Innovative break-away visor screws. 16 port hi-flow cooling system both pulls and puses air for maximum ventilation. Ultra-plush quick-dry comfort liner is both removable and washable for maximum ventilation. Adjustable, cam-lock strap dividers allow customization for different head shapes and riding styles. CPSC 1203, CE EN1078, Varies by regional standards.