Made in a comfortable Universal Fit size with our convenient Roc Loc Sport fit system, the Register adjusts with a simple turn of the dial so you can tune the fit in seconds. Meanwhile, a range of colors lets you choose exactly how your on-bike style comes together. The Register MipsA(R) helmet also has an integrated Multi-Directional Impact Protection System, which can redirect energy and provide more protection in certain impacts. SPECS:- REFLECTIVITY : REFLECTIVE CIRCUMFERENCE : 54-61 CM CONSTRUCTION : -IN-MOLD POLYCARBONATE SHELL WITH EPS LINER -FULL HARDBODY(TM) SHELL VISOR : QUICK LINK REMOVABLE VISOR COUNTRY OF ORIGIN : CHINA VENTILATION : 22 VENTS FIT SYSTEM : ROC LOCA(R) SPORT MIPSA(R) PRODUCT WEIGHT : 285G (SIZE UNIVERSAL ADULT CPSC, CE) CERTIFICATION : COMPLIES WITH THE US CPSC SAFETY STANDARD FOR BICYCLE HELMET FOR PERSONS AGE 5 AND OLDER E.U.: CE EN1078 HIGHLIGHTS : -COMPACT SHAPE -REFLECTIVE ACCENTS -QUICK-DRY PADDING -SLIMLINE WEBBING