jefmcg
Guru
I'm currently using cheap, swap-the-lens glasses, and I find I am keeping the same lens on for 24 hours as I forget to swap at cafes and don't want to take a break to do it (also for going in and out of forests), and so I'm attracted to something like these http://www.evanscycles.com/products/endura/marlin-glasses-ec022293 - but there doesn't seem much talk about them on forums. Are they are bad idea?