Optimal visibility and next level style, the B-1 Goggle was designed to work in unison with your low profile Bern lid. The B-1 Goggle comes locked and loaded with two interchangeable Zeiss lenses, hooking you up with maximum clarity in all conditions. Each lens is fit with a quick-change mag strip and Zeiss’ Sonar Technology so you can swap lenses faster than the conditions can change. Got that off their website. These have been worn twice. Once during a storm and once on a sunny day. Used both lenses and they change out so fast and easy. I never wipe the inside of any of my goggle lenses, so they won’t fog up ever. They seem to be a little to big for my face :(