Fit, Protection and StylePerfect for tackling the single track, riding dirt jumps or grinding out miles on the XC bike, the Troy Lee Designs A1 MIPS Helmet offers all a rider could want – a premium fit, protection and style. Following years of research and development, this lightweight, fully encapsulated all-mountain helmet delivers maximum coverage to keep you safe and protected, regardless of the conditions. And now with rotational brain protection thanks to the addition of MIPS, the A1 is one of the most comfortable and safe helmets on the market.