The mirror is made of the super clear automotive-grade glass lens and has a shutter-proof function. Compared to the most bike mirrors in the market, this mirror is NOT made of cheap and environment unfriendly plastic acrylic. It is much clear and also it is slightly convex surface so you can get a better view to see what's behind you! With the Hafny HD Automotive Anti-glare Blue Lens, it provides 50~60% anti-glare function in the bright environment. The level of the anti-glare function is widely used in the car. Why not using on your bikes? it is also slightly convex surface so you can get a better view to see what's behind you! It is ideal for bikers when you usually ride during the day time and allows your eyes to feel more comfortable during the ride.