Googles are often the lowest hanging fruit to improving your skiing. If it's hard to see then it's hard to ski. At minimum, all of our goggles have double lenses to prevent fogging. Also look for are spherical lenses to minimize distortion. Adjustment for different light conditions is a worthwhile feature to look for. This is achieved via replaceable lenses with differing tints or photochromic lenses that automatically change tint with sunlight.