Using your Blaze WaveCel Mountain Biking Helmet is easy. First, adjust the BOA Fit System to get a snug and comfortable fit on your head. Make sure the lay - flat camlock strap dividers are properly placed and use the Fidlock buckle to secure the helmet. You can decide whether to use the removable 3/4 coverage part depending on your needs. If it's cold or you want more protection, put it on; if you prefer a lighter feel, take it off. When using the visor, adjust it to one of the three positions according to your goggles and sunlight conditions. Also, you can store your sunglasses on the visor when not in use. For the Blendr mount, you can attach your Trek light or GoPro to enhance your biking experience. As for maintenance, use a mild soap and water to clean the helmet regularly. Avoid using harsh chemicals as they may damage the helmet. Store it in a cool, dry place when not in use. And always check the helmet for any signs of damage before each ride. If there are cracks or other issues, it's time to get a new one.