Wolsport Knee Support Sleeve Review, I received this product for free for my unbiased review. My review is solely my own opinion. The Wolsport Knee Support Sleeve is made out of 50% spandex , 25% elastic band and 25% nylon, Is very soft and comfortable to wear to and it has a 5 year guarantee. Comes in Medium and Large and I wish it came in x-large myself because I would like it to been a bit bigger than the large just were it would give me a little wiggle room . It helps to protect your knee when you are walking or running or jumping, also as you wear it the Wolsport knee Support sleeve will make walking and running a little bit easier if you have had issues with your knees before.