Classic Style & Ultimate Fit: Breakthrough technology that delivers the deepest fit with unlimited customization for supreme comfort and security. Slim, Deep Fit: SLIMTECH CORE with EPS Matrix Foam is 22% thinner than a standard helmet, delivering the slimmest, deepest fit. No Wiggle Fit: FLEXLOCK FIT system and 17-piece padding kit ensure a fully adjustable, secure fit to hug your head no matter how hard or big you spin. Maximum Protection: Triple-certified to meet U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older, ASTM F1447 for Recreational Bicycling or Roller Skating, and ASTM F1492 for Skateboarding and Trick Roller Skating Versatile Sizing Options: Available in XS/S (51 – 54 cm), S/M (53 – 57 cm), L/XL (57 – 60 cm), XL/XXL (60 - 63cm) sizes, this helmet ensures a perfect fit for every head size, offering personalized protection and comfort for all users.