You never have to worry about the sun's glare while swimming the backstroke with the Photochromatic technology of the Nike Vapor Photochromic Goggles. These goggles are equipped with lenses that darken automatically when exposed to sunlight. The soft and flexible silicone gaskets allow a comfortable feel. The straps are stretchable for a customizable fit, while the padded eye sockets offer comfort and effectively block water from getting in.