The giro revel mtb helmet39s confident style and breezy ventilation combine in a compact design that compliments nearly any ride some of giro39s best features like in mold construction coupled with the ease and comfort of their new roc locreg sport fit system offer the versatility you need to ride it all from downtown streets to twisting climbs to singletrack trails this is one of the best performance values in the giro line revel mips models are available with