Giro feather ladies helmet the giro feather ladies helmet a female specific all mountain helmet that does not compromise on performanceoffering more coverage than a traditional xc helmet giros in form fit system allows you to fine tune the helmets fit and allows a proper interface between your goggles and helmetthe 12 vents are designed to push and pull hot air to keep you cool on summer riders and long climbssizes s 51 55cmm 55 59cm