Premium Knee Support Sleeve (Pair): Tourmaline Infused Compression Sleeves Emit Infrared Pain Relief I have tried many kinds of these sleeves, and many to is to tight or have the stuff to hold it up. I have very big calves and the really tight ones cut off the blood. They work and make walking better the copper after wearing a few days you will feel the difference in the bone or joints mostly. They begin to move better and smoother. You can walk quicker and easier. The material is smooth to touch and does not poke you or rub the wrong way. It's a great sleeve to wear to walk in or all wear. I received this product at a heavy discount or for free for a honest review.