These are now on my hat! I have reached that age where I need "cheaters" to tie on a fly, but I don't care for those flip down types, and I hate carrying around an extra set of glasses. The Flex Spex easily and very securely clip to the brim of your hat or even your sunglasses. What I like best is that Flex Spex are unobtrusive. They aren't bulging in a pocket or hanging around my neck, and I don't even notice them when not in use. When I need to use them I just pull the lenses down on their flexible conduits and connect them with a magnetic nose bridge. High quality construction, made in the USA.