The Original Mirror attaches to sunglasses or a helmet to allow cyclists and other outdoor enthusiasts to see behind them without turning their heads, much like a rearview mirror on a car. The Original Mirror is our only product that works on both the right and left side. And our site is the only place where you can also customize the length of the stem. Other features include: Vibration-free, Three pivot points for optimal adjustability, Frameless mirror means uninterrupted field of vision, Original stem length great with wrap around glasses