6d atr 1 s2 helmetthe atr 1 s2 helmet is designed with omni directional suspension technology that uses a gel damper system at strategic locations that move in six different directions to absorb energy from impacts the atr 1 helmets are built with a vent that pulls fresh air in and evacuates hot air to keep the rider coola removable liner allows you to keep your helmet clean after every ride a removable liner allows you to keep your helmet clean after every ride for the best in dirt bike pro