It slides down
[This review was collected as part of a promotion.] The light compression sleeve does a good job of protecting my knee when I first put it on. After a few minutes of tennis or running, the top slides down. I carefully measured my leg before purchasing and repeated the procedure after the issue occurred. I have the correct size. CEP customer service suggested using tape or glue to keep it up after confirming the sizing and that my leg was clean and oil/lotion free. I tried two sided tape made for this purpose but it didn't help. to recap, they work well when you first put them on.