Using this helmet is easy. Just put it on like you would any other helmet. Make sure it fits snugly on your head. When you're using the communication or hydration systems, follow the installation instructions carefully. For the tear - offs, simply remove them when they get dirty or scratched to keep your view clear. As for maintenance, clean the helmet regularly with a mild soap and water. Don't use harsh chemicals as they may damage the shell or the shield. Store the helmet in a cool, dry place when not in use. Also, check the M6 inserts and other fittings periodically to ensure they are secure. If you notice any damage to the helmet, don't use it and get it inspected by a professional.