Using your Chamonix 2 road bike helmet is easy. First, adjust the Headset SX fit system using the micro - adjustable dial until it fits your head securely. Make sure the Tri - Fix web splitter is in a comfortable position and adjust the straps accordingly. When riding, especially in low - light conditions, the reflective webbing and decals will help motorists see you. The patented clip - on visor can be attached as needed. As for maintenance, use a mild soap and water to clean the helmet. Avoid using harsh chemicals as they may damage the helmet. Always check the helmet for any signs of damage before each ride. If it has been involved in a crash, replace it immediately, even if there are no visible signs of damage. Also, keep it in a cool, dry place when not in use.