Features: Designed for casual training or long endurance skating sessions Modern and lightweight design is ideal for skaters wanting a minimalistic helmet while retaining functional features In-mold technology makes the helmet lighter and more breathable due to the more complex shaping of the vents 18 strategically shaped vents help keep air flowing through the helmet while in use to keep you cool EPS liner dissipates force and absorbs impact with open foam padding for added cushioning Adjustable ring sizing system allows for customized sizing with a buckle, chin strap, and locking Y-straps for a snug fit Reflective labels help keep you visible in low-light situations CPSC certified Sizes (cm): M (54-58), L (58-62)