System Integration Micro-Dial Fit w/ Ergo-Fit EVA occipital pad offers unmatched comfort and customizable fit Wicking pads with heat-sealed seams keep sweat under control Single-mold polycarbonate shell technology bonds the outer shell with the EPS shell for one-piece integrated design Removable visor 19 flow-through vents span the helmet and keeps riders cool in any terrain Two sizes: L/XL 58-62cm/22.8-24.4in - S/M 52-58cm/20.4-22.8in. 310gm (s/m with visor) Comfort able soft-touch webbing with cam-lock dividers offer secure adjustment and all-day wearability