If you ride everything and ride fast you need the same cool comfort and performance whether youre on the open road or your favourite singletrack the giro fathom helmet is a twin to giros legendary atmos a breakthrough helmet design that offers amazing ventilation thanks to a clever internal reinforcement structure the compact design is a style leader and matched with a removable adjustable visor and the two way adjustable roc loc 5 fit system offers the performance and versatility you n