What is the Neoprene Patella Knee Support? This high quality patella knee support has been made from high grade closed-cell neoprene sponge, which has been covered with highly flexible stretched polyester fibres to provide superior comfort, support and protection to your knee, this helps to relieve knee pain and swelling without adding pressure to the knee cap. When can I use the Neoprene Patella Knee Support? Use the Patella knee support to relieve pain and swelling following a sports or work related knee injury as well as helping to relieve mild knee arthritis too. This knee support is also ideal for use in cold weather when knee pain tends to worsen. How does the Neoprene Patella Knee Support Work? Made from high-grade closed-cell neoprene sponge, which has been covered in very flexible stretched polyester fibres on both sides, this patella knee support provides maximum comfort and support to the knee. It helps to reduce pain and swelling, improves circulation and speeds up recovery. The patella support also features an open knee cap to allow ventilation to the front of the knee; this helps to prevent too much direct pressure on the knee cap. Composition: 70% Neoprene sponge and 30% stretch nylon fibre. Hand-wash only. What size do I need? Remove all clothing from the area. Measuring above clothing may cause the wrong size to be ordered or the product to not fit correctly. Please use a tailors tape measure to take your measurement. To find the size you need, take measurements around the centre of the knee. If you are between sizes, please choose the larger size. This product can be used on either the left or the right knee. Small: 30 - 34cm (11.8" - 13.4") Medium: 34 - 38cm (13.4" - 15") Large: 38 - 42cm (15" - 16.5") X-Large: 42 - 46cm (16.5" - 18.1")