Polycarbonate Hypoallergenic silicone seal for water tight fit. PVC and Latex Free Excellent corrective lenses competitive and training goggle Swim goggle with custom diopter level designed for extra clarity under water Anti-fog lens with UV Protection Optical clarity is at its highest when you break the water's surface in the Promate Optical swim goggle. Lens Features: Available in negative diopter -1.5 to -8.0. Made from durable polycarbonate. Panoramic design for visual clarity. Offers UV protection from the sun's harmful rays. Anti-fog lens technology. Frame Features: Sleek, low-profile build. Optimal inner eye fit. Gasket rests snugly and securely in the eye socket. Cushioned silicone seal. Four interchangeable nose pieces. 100% PVC- and latex-free construction.