I bought as a xmas gift. He just tried it and by the end of a golf game the top had slipped down below his knee. I bought the medium for a 5'8" around 180 pounds. It fits well. Not too tight. Not too loose but it crawled down. Next try he's going to pull the top band, the thigh section over the top of the brace. He wears the Ossur bionic looking knee brace. The Ossur sleeve that came with the purchase stays in place but are expensive. Will give one last try. I may end up ordering the Ossur to replace his xmas gift.