The Women&';s Source W Mips Helmet combines advanced performance and protection in a rugged, trail-ready design. The Women&';s Source(TM) W MipsA(R) helmet combines advanced performance and protection in a rugged, trail-ready design. Featuring deep coverage with aggressive ventilation from 16 vents coupled with deep internal channeling, it helps keep things cool even when the riding gets rowdy. And with the comfort and secure feel of the Roc Loc 5 fit system with Integrated MipsA(R) brain protection, plus a moto-style adjustable screw-in visor and full lower Hardbody(TM) durability, you get a helmet that&';s capably equipped for fun and adventure. FEATURES INTEGRATED MIPS CIRCUMFERENCE - 51-55 CM IN-MOLD POLYCARBONATE SHELL AND EPS LINER POLYCARBONATE HARDBODY(TM) LOWER SHELL ADJUSTABLE MOTO-STYLE SCREW-IN VISOR COUNTRY OF ORIGIN - CHINA 16 WIND TUNNEL VENTS WITH INTERNAL CHANNELING ROC LOCA(R) 5 PRODUCT WEIGHT 351G (SIZE MEDIUM CPSC)|340G (SIZE MEDIUM CE) CERTIFICATION COMPLIES WITH THE US CPSC SAFETY STANDARD FOR BICYCLE HELMET FOR PERSONS AGE 5 AND OLDER E.U.: CE EN1078