When the ground is white, the mountains are white, and the sky is grey, you're going to need more than just a pair of sunglasses to avoid going snow blind, and that's where the Dragon MountaineerX Polarized Sunglasses come in. Coming from Dragon's Glacia Silo line, these sunglasses are well equipped for everything from glacial travel to sunny tours in the backcountry thanks to the included leather shields, a rope lanyard system, and light filtering lenses. The Polarized lenses block 100% of UV rays and dramatically reduce glare on surfaces for better visibility when the sun's out. Their lightweight T 90 frame features Dragon's interchangeable C Temple system, which allows the temples to be switched between a standard temple design and one that wraps around the ear for a more secure fit in more demanding conditions. The impact resistant lenses are treated with a hard coating that is hydrophobic, fog resistant, and anti smudge, ensuring your field of vision remains clear during the ascent.