Breakthrough technology that delivers the deepest fit with unlimited customization for supreme comfort and security. It starts with Pro-Tec's most advanced and slimmest-profile shell design, wrapped with newly designed luxurious liners to hug your head like you've never experienced before. The Low Pro is a true helmet revelation - and it's fully certified for: U.

S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older. ASTM F1447 Standard Specification for Helmets Used in Recreational Bicycling or Roller Skating. ASTM F1492 Standard Specification for Helmets Used in Skateboarding and Trick Roller Skating. Sizing: XS/S: 51-54cm | S/M: 53-57cm | L/XL: 57-60cm Size: L/XL, XS/S, S/M