While the Pit Viper Originals were designed to be shot, sat on, and run over while maintaining sun and wind-bucking ability, consumers demanded an even more durable, premium-er Pit Viper. The future is here, it's The 2000s. Built with a softer nose piece, improved optics, and sturdier E-Spot™ and Turbo Adjustment™ these bad boys will demand respect and authority with long-lasting comfort and versatility. The 2000s - everything you ever wanted. Lens: Photochromic Polycarbonate Look thru color: Clear- Grey Light transmission: 76%-11% CAT 1-3 100% UVA + UVB protection E-spot Adjustment™ adjustable earpiece length Turbo Adjustment™ adjustable lens angle No-slip-grip rubberized touch points