Good product.  Excellent customer service.
These are 7mm, so they not only support my knees while squatting etc., but act as a bit of a knee pad for lunges and while stretching.  I imagine they would be helpful for those 23.5 box jumps.  They also provided me exceptional customer service. I measured 15&#34; calves and ordered the XL.  They were tight enough to stay in place, but didn't offer much support.  I contacted them via email.  After reviewing how I measured and ensuring they understood my issue, they sent me a smaller size (large).  Now that I have good knee support, I realized my real issue is my ankles.
Rating: 5 stars