I primarily bought these sunglasses for biking in early mornings with very low light. I want to protect my eyes from bugs, dust, tree branches, etc. so biking without eye protection isn't great. I love the lenses because they change color very fast. I even wear these sunglasses as safety glasses when mowing the lawn and using a string trimmer. My only gripe with these are the arms are very tight to the head, so I can't wear them for extended periods like my other Oakleys. I also wish Oakley made interchangeable lenses.
Bought these for the photochromic lense as 80% of my riding is early(ish) mornings when the shadows along tree lined roads make it difficult to differentiate what's what. They do the job! Surprisingly, really liked the slightly taller profile. Allows for better coverage when in aggressive position without have to crane the neck so much.
Ideal for rides that move between shaded and brighter conditions. Lenses adapt quickly. Lots of my rides are on heavily wooded hills where traditional dark lenses are too dark for the shady sections. Pricey withhigh quality optics.