In mountains, radiations are extreme, especially in winter. Snow reflects 85% of UVs and this amount increases by 10% every 1000 meters of altitude. Julbo has been one of the world's leading brands of mountaineering eyewear since it was established in the foothills of the French Alps in 1888. The success of your adventures depend upon your healthy eyes -- the health of your eyes demands the best -- Julbo provides it with confidence!!