The K2 Ally is a simple helmet for ladies looking for a clean look. This lightweight helmet has a removable and washable Full Wrap Liner that will keep this helmet fresh for seasons to come. The Ally has the Passive Channel Ventilation System that has channels in the inside that direct air flow between your head and the helmet to expel moisture and heat to keep your temperature comfortable all day regardless of how hard you are working on the mountain. The 360 K2Dialed Fit System is very easy to adjust to provide you with a comfortable and safe fit throughout the day. If you are looking for a helmet that will not break the bank, but looks good, and comfortable the K2 Ally is the helmet for you. Passive Channel Ventilation, 360 K2Dialed Fit System, Washable Full Wrap Liner System, 394g, Sm (51-55cm) Med (55-59cm), Certifications: ASTM F 2040 EN1077, Warranty: One Year, Race: No, Category: Half Shell, Audio: Not Compatible, Brim/Visor: Yes, Ventilation: Fixed, Adjustability: Full, Year Round Capable: No, Shell Construction: In-Mold, Model Year: 2018, Product ID: 388254, Shipping Restriction: This item is not available for shipment outside of the United States., Model Number: S1408017012, GTIN: 0886745324201