The improved hydrodynamic properties and low-profile design of Streamline goggles ensure maximum gliding efficiency in the water with minimum resistance. The goggles are fit with a double strap and a low-profile face seal that ensure their safe staying in place during diving. The lenses have a special anti-fog coating and UV protection. 3 interchangeable nose bridges are enclosed. Mad Wave offers lenses with a wide dioptric range (from -1.0 to - 9.0). Lenses are provided separately. The goggles are certified by the World Aquatics Federation (formerly FINA) for participation in international competitions. FEATURES: Rainbow lenses – colorful design and additional glare protection; UV protection – protection from ultraviolet radiation; Anti-Fog coating – ensures clear, excellent vision swim after swim; World Aquatics approved – item is certified by the International Swimming Federation World Aquatics.