DESCRIPTION

When you're trail running, skiing, or mountain biking, light conditions can change dramatically, depending on variations in terrain and foliage. Instead of changing your glasses or going blind every time come out from under a tree, throw on your Zeal Optics Sustain Polarized Photochromic Sunglasses, and be ready for anything. Zeal's ZB-13 polarizing reduces glare by 99%, and the exclusive photochromic lenses adjust from 13% to 28% visible light transmission, according to conditions.