When we need the best snow goggles on the market, Dragon goggles are at the top of our list. The Dragon NFX Mag Goggle Replacement Lens utilize Dragon's Lumalens technology which help to maximize colors and contrast so we get the best possible vision as we are flying down the mountain. The Dragon NFX Mag Goggle Replacement Lens are premium injection-molded lenses with a cylindrical shape. These lenses only work with dragon's magnetic lens changing system and have a frameless technology for a better field of view.