GUDOOK Kids Youth & Adults bike scooter and skateboard helmet，Multi-Sport Scooter Inline Skating Rollerblading helmet

Multiple certificationsComplies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5, SPSC 1203/ASTM F 1447,Australian/New Zealand AS, NZS 2063-2008 certification, holds EU CE certificate, and meets EN1078 test standards.DurableConstructed with reinforced ABS shell and thick shock-absorbing EPS core for comfort and impact resistance.Its Rugged ABS Shell and shock-absorbing EPS foam effectively reduce the impact of any potential falls, providing essential protection to keep the wearer safe from bumps and bruises.Skateboard helmet with removable liners for different head sizes and easy to wash the sweat away.Available in three sizesSmall (48-53 cm/ 18.9-20.87 in.) for baby toddlers and children. Medium (54-57 cm/ 21.6-22.44 in.) for youth teenagers and adults. Large (58-61 cm/ 22.83-24.0 in.) for adults. Various colors for men, women, boys, girls, and babies. Please choose the helmet size according to the head circumference.A HELMET for MULTI-SPORTThis classic bike & skateboard helmet is perfect for a variety of outdoor activities, including biking, skateboarding, roller skating, scooter rollerblading, longboard, and hoverboard. SKATING, CYCLING, BMX, MTB, etc.HOW TO MEASURE A PROPER HELMET？To find the right size bike helmet, start by measuring your head circumference, wrap a flexible tape measure around the largest portion of your head—about one inch above your eyebrows. Or, wrap a string around your head, then measure the length of the string with a yardstick. Size Large is recommended if your size is between 21.3 and 22.8 inches (54 cm-58 cm).