The company's sunglasses are made of 2.2mm thick polycarbonate lenses, offering 100% UV protection. They also have a Z87+ rating against dust, impact, and chemicals. This makes them ideal for any outdoor activity. Unlike other sunglasses,1993 Pit Vipers were designed with durability and performance in mind. It is perfect for mountain biking, skiing, snowboarding, hiking, fishing, and more....