Using your Giro Montaro MIPS II mountain bike helmet is easy. First, choose the right size from the SUPER FIT™ options provided. Put the helmet on your head and use the Roc Loc® 5 Air Mips System to adjust it for a snug and stable fit. When you're riding with goggles, the strap grippers and the P.O.V. Plus™ visor will help you get a great fit. After your ride, you can lift the visor and place your goggles on the front of the helmet. For using a light or camera, just attach it to the breakaway interface. As for maintenance, keep the helmet clean. You can gently wipe it with a damp cloth. The Ionic+™ padding has anti - microbial properties, but it's still a good idea to air it out regularly. Make sure to store your helmet in a cool, dry place. And always check the helmet for any signs of damage before each use. If it's been in a crash, replace it right away to ensure your safety.