At work we have to wear safety glasses as soon as we walk in, so I always have a nice wrap around pair with me. The other day I went to put on my helmet leaving work an realized I had my glasses on so I just pulled them off, put on the helmet and put them back on. My backpack was already on and I was ready to go and it was hot as hell, that's the way I rationalized it anyway. I found that I really like the extra dark. The sun is really beating down when I leave work and this makes it easy on the eyes.