Pro-Tec Athletics J-Lat Patella Support, Provides Lateral Tracking Control with Dual Elastic Straps and J-Shaped Tubing, Improves Patellar Alignment and Stability for Subluxation Right, Large

This brace is day and night for me on knee pain. Without them (I do both left and right knees) I'm lucky to go 15 minutes a couple times a week on the treadmill. With them I can go and hour plus 6 days a week. I'd done all the stretches and support strengthening exercises but wasn't getting anywhere until I got these. Once able to get on the treadmill it seemed to support my PT for same. I've Had these about a 1.5 years and use them considering vacations, travel and such likely 5 days a week for about an hour each time. They are still very functional although the ends are starting to cosmetically fray. I have tried three other styles of knee braces and these help me most by far--no comparison.They seem to be made with Neoprene (wet suit material). You will sweat underneath them as they do not breath. The sizing chart is Wrong. These Run Small, way small. I measured several times just above the knee as shown and was solidly in the middle of the Medium size by the chart. But I could barely get the Mediums on and it felt like I wasn't getting any circulation. Nevertheless, I wore them painfully for a week about 30 minutes a day thinking/hoping they'd loosen up. They didn't. I ate the cost due to having worn them so much. I then desperately bought the Large size. They were quite snug but doable. After a couple of months they loosened up a little and have stayed the same until now. Thus but at least 1 to 1.5 sizes bigger than shown. If what you get seems crazy tight. Send back for next size immediately because they won't stretch much.I like these so much, I'm considering buying a second set to have when these eventually wear out, just in case they stop selling them, or make a dumb "improvement" to them