Just spent 2 weeks with these in western Australia and they were great. I took a massive faceshot while sandboarding and these guys stayed in place no sweat. Even better the lenses weren't scratched by the sand that got on them. The lenses do a great job of muting the sun and cutting glare with out weird color shifts, distortions, or image blur. The frames do a great job balancing comfort with security. You can wear these for hours on end without discomfort while being confident they will stay put during activity. The included case is very sturdy, except for the metal zipper tab that broke off at some point in my backpack. That's annoying because it makes it much harder to open the case.