First brace I ever owned, and rode with them for a year/season. I wanted to like these braces and bought them because I liked the use of aluminum over plastic/carbon fiber, but first impressions when riding were very regretful. These braces are very bulky and restrictive, the pants get stretched around the brace and then your mobility is extremely limited as your legs feel sort of locked up when like trying to mount the bike, shift/brake, or even in extreme body positions in cornering etc. Very uncomfortable and took a bit of modification, removing the top strap of my boot helped a lot for mobility/freed-up my legs(made the brace ridable) and I had to add extra velcro to keep the pad lining in place because the top and bottom linings would pinch your skin in the knee area SEVERELY as you worked them loose from standup to sitdown positions. For the period of time I used them they were very durable, but Ive seen a lot of bad reviews on the durability of the hinges. The protection is questionable, as the braces do migrate a lot and twist/rotate on your leg(bent or straight) because there is very little contacting/hugging your actual leg. What helped them stay up in place the most was my boot. So nothing to keep you from tweaking your knee as your leg can move around in the braces, just a glorified knee guard really, but a pretty good knee guard in a sense. Maybe I got a size too big? I got a medium, that's what I measured to, and that's what I have now in a different brand(they fit perfect), so maybe try a size down. Once I modified them a bit the braces were good, and as I started riding I could almost forget they were on, even with them as restrictive as they are, but for the price these braces were a very bad buy. Either go proper $400+ braces or save some money and try the 661 Cyclones(they look right for the price).