Nike Swim Unisex Legacy Mirror Performance Goggle is made with curved lenses, enhancing the field of vision while in the water. The curved back clip is sure to allow comfort on the back of your head without jeopardizing performance. They are made with the Nike Swift Track nose bridge system to ensure fast and easy customization. The mirrored coating on the lenses helps block UV rays and reduce glare when swimming outdoors. This goggle is FINA approved.