Sunglasses aren't just for style now. Sure, the Electric Stacker Polarized Sunglasses look great on your face when you're wearing them around town, but they're built to do so much more. These Outside Magazine Gear Of The Year award-winners feature a removable soft touch mask that closes the gaps between your face and your shades. This mask keeps sunlight out during high-altitude treks, blocks out wind when you're snowboarding on warm spring days, and seals out dust when you're ripping singletrack on your mountain bike. Of course, the Stackers' innovative features don't stop at the mask. A fog-reducing lens ventilation system keeps air flowing through, even with the mask on, to reduce fog buildup. The flexible, yet strong Grylamid frame offers a comfortable fit while ensuring durability during rough activities. Shatter-resistant OHM+ lenses are equipped with an anti-reflective coating and polarization to eliminate glare, and they also sport hydrophobic and oleophobic coatings to shed water and resist fingerprint smudges. The double-action plastic hinge system removes metal from the equation in order to offer twice the strength at half the weight. Leash holes at the ends of the arms allow you to secure your glacier glasses so they don't disappear when you take a tumble on the slopes or get tossed in the drink while navigating class IV rapids. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.