Description of Julbo Track Lite Sunglasses - Zebra X2-4 Lens:
Designed for women and men with smaller faces, the Julbo Tracks Light Sunglasses feature Zebra photochromic lenses that automatically adjust to changing light conditions. Now you can run, hike, or bike without having to fuss with interchangeable lenses. Julbo also gave the Track Light a lightweight acetate frame and cushioned nose pads for all-day comfort. An anti-fog lens coating helps reduce flare-ups on cold days.
Bottom Line: Stay protected in any light conditions.
as a small-framed woman who can't stand polarized lenses, it's been hard to find glasses which protect my eyes and don't give me headaches. i participate in various sports which require both close and distance vision to be crystal clear, and these glasses have so far been great. the real test will be next summer, but i have to say that they fit well, don't slide around on my nose, and are comfortable enough to wear for hours at a time.
the frames are less stiff than i expected, so putting them on one-handed turned out to be harder than i'd like. other than that, they're perfect.