Using the CORE Action Sports Helmet is easy. First, adjust the chin straps to fit your head size. Make sure the helmet sits snugly on your head but isn't too tight. You can use the red safety buckle to fasten it securely. When you're out skateboarding or riding your bike, the 11 air vents will keep your head cool. For cleaning, simply remove the 3 pieces of inner padding and wash them regularly. This will help keep the helmet fresh and hygienic. Always check the helmet for any signs of damage before use. If it has been in a serious impact, replace it immediately for your safety. Store the helmet in a cool, dry place when not in use to maintain its quality.