The EXV range from Giro has been designed to allow quick and seamless switching of lenses to adapt to changing weather and light conditions. The Snapshot Magnetic Lens system is a super-fast, idiot-proof way to change your lens. There are magnets around the edge of the semi-frameless goggles that securely guide the lens into the correct position - simply push on the upper right corner and it will click into place. To release the lens, press down on the shutter-style button on the top right of the frame and rip the lens way.