Do you mean knee wrap? A sleeve wouldn't really do much as most are not tight enough to provide much extra stabilty. They're more just to keep the joint warm. If you mean knee wraps, I've heard the ATP convicts provide a very large amount of support. There was also a video recently about knee wraps on starting strength that you might find helpfull.
http://startingstrength.com/index.ph...orm_knee_wraps