I feel they cover up knee injuries and give you a false sense of security while letting the stabilizing tendons and ligaments around the knee atrophy all the while letting you use a heavier weight. Theyre a recipe for disaster IMO. I use neoprene knee sleeves. I was up to 585 when I was 22 using knee wraps for 6, but never got a good pump in my quads. Without them I never got over 495 for 12. Now I try not to go over 405 and I get a great pump in my quads.