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