Using the CORE Action Sports Helmet is easy. First, choose the right size according to the size guide. Put the helmet on your head and adjust the chin straps so that it fits snugly but not too tightly. The red safety buckle makes it easy to secure. When you're out riding, the 11 air vents will keep your head cool. For maintenance, remove the 3 pieces of inner padding regularly and wash them to keep the helmet fresh. Store the helmet in a cool, dry place when not in use. Make sure to check the helmet for any signs of damage before each use. If it's been in a significant impact, replace it immediately for your safety.