Premium features certified protection & sleek styling make the Chamonix a tremendous value for any cyclist. One-size system designed for easy & accurate fit to a wide range of head sizes. Headset SX fit system with micro-adjustable dial for easy secure & accurate fit. 4th Dimension Cooling System optimizes ventilation. In-moulded shell improves strength & reduces weight. Tri-Fix web splitter for enhanced comfort & ease of strap adjustments. Reflective webbing & decals for increased visibility to motorists in low-light conditions. Patented clip-on visor included. MIPS-equipped. ANGi crash sensor port.