Comfortable, durable, and affordable, our helmets are made with quality materials and strict attention to detail. If you only choose one piece of protective gear, a helmet is a “no brainer”. Ride hard, ride safe. SPECS: High-density, impact resistant ABS outer shell Shock absorbing thick EPS liner Adjustable chin strap Strategically positioned air vents Two sized liners for optimum fit CPSC certified SIZING: Run a tape measure around your head just above your eyebrows to get an accurate measurement. S/M = 19" - 21" L/XL = 21" - 24"