100% Cotton Imported Reliable Protection and Comfort: High impact-absorbing EPS foam, thick dual-density soft foam, and plush moisture-wicking Sweatsaver fabric Custom Fit, Every Time: Includes two different size sets of Sweatsaver pads to customize fit; pads fit very snug when they are brand new, but after a couple of hours of wear, the helmet will break in and start to feel just right Fine Tune Your Fit: To determine the proper size, measure around head with a soft tape measure or string; liners should be used to further customize fit Versatile Sizing Options: Available in four sizes: XS/S fits 20 – 21.25 in (51 – 54 cm), S/M fits 21 – 22.5 in (53 – 57 cm), L/XL fits 22.5 – 23.5 in (57 – 60 cm), XL/XXL fits 23.5 – 24.5 in (60 – 63 cm) Top Notch Safety: 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