The Kask Koo Supernova sunglasses are specifically designed to be high performance, frameless sunglasses for running, cycling and other activities where lightweight, perfect fit and panoramic visibility are musts. The SUPERNOVA has a total weight of only 21 grams, making it one of the lightest sunglasses you’ve ever seen. Experience a snug and protective fit while at the same time, you can enjoy a more panoramic view with better ventilation. The wraparound fit secure and protects you from bright light, airbone debris, and wind, while the toric Nylon lens has been developed in collaboration with Zeiss - the best option for lightweight lenses with clarity of vision.The SUPERNOVA sunglasses are specifically designed to be high performance, frameless sunglasses for running, cycling and other activities where lightweight, perfect fit and panoramic visibility are musts. The incredibly thin and flexible temples can be adapted to most head sizes and shapes to always stay in place thanks to their soft, grippy rubber temple tips. FeaturesUltra-lightweight at only 21 gramsFrameless single lensNylon toric lens by ZeissShatter-proof, anti-reflective and 100% UV ProtectionHigh temple flexibility and breaking resistanceSuperior field of visionInterchangeable nose padUniform Multilayer Mirror coatingHydrophobic technology anti drop