Great fit and comfort With two layers of face foam and silicone on the inside of the strap, these goggles easily adapt to the shape of your face and stay in place through all your runs. Durability Made so you can enjoy impeccable vision and comfort season after season, these goggles are made with durable and flexible materials that will withstand the test of time. Automatically optimized vision The Photochromic lens automatically changes between a lighter and darker shade, so you can see clearly in all light conditions. Essential Infos Fit : Small Lens shape : Cylindrical Lens Technology : Photochromic Weight (g) : 110 LENS TECHNOLOGY Photochromic FIELD OF VISION Wide vision FIT Custom frame