Taking ski-mountaineering pretty seriously, your Julbo Shield REACTIV Polarized Sunglasses might be the handiest tool you own, aside from your boots and skis of course. The REACTIV lens use polarized technologies to keep your vision at its best, because the last thing you want on technical terrain is to lose site of foot and hand holds just because the sun ducks behind a cloud. Side shields come in handy when you're crossing a snowfield or heading up a skin track, and polarization keeps the glare off wet rocks from causing eye fatigue. Plus, if you want to wear them for the fun downhill part, these wraparound shades are designed to stay in place, and anti-fog coating keeps condensation away until the last turn.