Shock Wave Elastic Cloth Knee and Elbow Quick Pads - Black Sold in pairs because... well... most people usually end up wanting TWO... so we thought that would be a totally cool way to sell them! We designed these for doing most styles of combat martial arts like MMA, UFC, Karate, Wrestling, etc. though we know people buy them for general grappling or even just kneeling on the ground to do plumbing or something! And... oh yeah... they protect your knees (or elbows) pretty good... Well, really all of these things do (it's not rocket science with these things - they're all about the same), but at least you can send ours back if you don't like them because we're so darned laid back about it! ;) Machine washable - though the running them through the dryer a lot will kind of cook them after a while. Maybe that "air drying" thing would be a good idea for that?