The Vulkan Classic Knee Support is great for minor ligament and tendon injuries, sprains and twists. It is available in either 3mm or 5mm thick options depending on the level of support required. The 3mm thick sleeve provides moderate support while the 5mm option provides firm support.. Perfect for supporting and stabilising weak, sore, injured or arthritic knees, the three-piece design offers a comfortable fit and controlled compression. In addition, the neoprene design offers therapeutic heat retention whilst promoting air flow.. The knee support can be used for everyday use along with sport and exercise such as running, walking and weight lifting.. This knee support comes in a choice of five sizes: XS, S, M, L and XL. The correct size is determined by measuring the around the knee, over the kneecap whilst holding your leg straight. The size guide is as follows: XS - 26-30cm, S - 30-35cm, M - 35-40cm, L - 40-45cm, XL - 45-50cm.