These work great, they helped relieve my knee pain and literally added some spring to my step, lol.Very comfortable to wear, and they have two zig-zag lines of silicone in the top inner elastic to keep it from slipping down your leg. They should feel a little tight, but shouldn't make your leg go numb.I sized mine according to the guide in the listing and they fit fine.I wound up getting used ones since my new ones never seemed to ship, so try that if they seem slow to ship. Cheaper that way tooSee full review