Finally, seriously sporty shades for the big brained adventurer: the ample and accommodating Native Eyewear Bigfork Polarized Sunglasses provide superior eye protection against glare and harmful sun rays. The extremely lightweight Rhyno Tuff Air Frame and crystal carbonate lenses beautifully endure rough wear and tear with impact and temperature resistance. Innovative N3 lens technology shuts down infrared and UV rays for safe outdoor fun and peace of mind. When the light gets low or flat, do a quick and easy presto change o, thanks to the Single Snap Back interchangeable lens system. Now you're covered.