Premium features, certified protection, and sleek styling make the Chamonix II a tremendous value for any cyclist. You&';ll also find that it&';s equipped with next-level protection courtesy of revolutionary MIPS technology (Multi-Directional Impact Protection System). For helmets sold in the U.S. and Canada: Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older. MIPS-equipped. 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-molded 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.