The Arena Python Mirror Black/Silver goggles feature mirrored lenses which help provide additional protection against harmful UV rays for outdoor swimmers and assist in cutting down on the sun's glare in well-lit pools. Arena developed the snake-eye shape offering wide vision and hydrodynamic performance. This design is watertight and has durable hard lenses giving you a clear view and the soft silicone seals and strap provide comfort. The adjustable dual strap helps you get the best fit.