Inspired from the famous Bolle CHRONOSHIELD model, the SHIFTER is packed with simple yet innovative features to enjoy the ride. Curved temples, vented lens & Phantom lenses, have made SHIFTER the natural choice of our pro racing cyclists.Weight: 30gAvailable in prescriptionThermogripA(R)Cat. 3Tint base : GreyTransmission : 10%Excellent visibility and 100% UV protection with these classic polycarboante lenses. The grey base helps maintaining natural color perception.