Met 20 miles led helmetcycle in harmony with the town 20 miles is a high quality helmet with a long list of technical features every one of which has been designed to make your life easier featuring intelligent fusion in moulding construction for durability the safe t e twist occipital retention system with built in led light making you more visible in traffic after dark or when cycling through tunnels an anti insect net so you are not transformed into a mobile bee hive and a visor which pro