The Izipizi Glacier Sunglasses reinterpret a classic mountaineering silhouette with removable faux leather side shields that block glare and wind from the sides, not just the front. Mono-material hinges hold the tapered arms in place during real movement, so the frame doesn't slip or deform the way a typical pair might during a hike or a run. Category 3 grey lenses filter visible light for color-true vision while blocking 100% of UV rays, in a bio-based frame built to be both light and durable. What Our Gearhead(R) Experts Are Saying:"I pulled the side shields on for a windy ridge walk and actually felt the difference at my temples, and the frame never budged even picking up the pace on the way down."