The POC Retina Big Photochromic Goggle tackles a few of the problems faced by traditional ski and snowboard goggles with innovative thinking. The large frames provide a huge field of vision, so you can use your peripheral vision more effectively in the Retina big. The photochromic lens adjusts its tint automatically with varying light conditions, ensuring optimal vision for the given light. The Retina also gets some of the most sophisticated anti scratch and anti fog treatments in the industry for the greatest clarity possible. The soft coated polyurethane frame teams up with the triple density face foam for a gap free, super comfortable fit, and the silicone grip on the inside of the goggle strap keeps the strap from sliding up and down on your helmet.