The NL-12 : Inspired by vintage optical frames, reworked in our signature exploration style. Outfitted with genuine leather sides originally designed to block glare while mountain climbing or traveling on glaciers. The NL-12 is a modern interpretation of a classic look. Updated with a subtle pilot eye shape, this frame is easy for anyone to wear. Go exploring…high alpine style, or just enjoy the look. Glacier glasses aesthetically perfected.