Complies with one or more of the following safety standards for bicycle helmets: CPSC, SNELL B90A, CE and AS/NZS. One-size system - based on youth head sizing and designed for easy and accurate fit. Headset SX fit system with micro-adjustable dial for easy, secure and accurate fit. Reflective webbing for extra safety. Stylish, youthful designs compliment our bike graphics and colors. 4th Dimension Cooling System to optimize ventilation. In-molded shell improves strength and reduces weight. Light and easy to use U-Turn strap adjusters. Patented clip- on visor included.