Using this Zamp Z20 helmet shield is easy. First, make sure your helmet is one of the compatible models (RZ - 42Y, RZ - 62, or RZ - 70E). Then, gently attach the shield to the helmet following the natural grooves. When selecting the tint, think about the lighting conditions you'll be in. For sunny days, a darker tint might be better. When you're done using the helmet, remove the shield carefully and store it in a cool, dry place. Avoid scratching the shield with sharp objects. To clean it, use a mild soap and water, and then dry it with a soft cloth.