Sizing info and "how dark"
I couldn't find any sizing info for glasses. Would be helpful if I could get the following measurements, 1) length between the hinges, 2) between the tips of the arms when fully open, 3) between the top of the nose bridge and the bottom of the lens in front and 4) length of each lens, sidewise.
Are these lenses replaceable? Also how dark are they? If I do a forest run, are they clear enough?