Thuasne Action Reliever Knee Brace. It is available on prescription but not all Health Authorities agree to it being prescribed. Get brochure from Thuasne which will include pack for your GP, discuss with GP, see if it can be prescribed. Otherwise you can buy it privately, £299 , but £250 with VAT exemption if osteoarthritis has been diagnosed plus further 10%off for first order from Thuasne brings it down to @ £225. It is brilliant, with a patella ring that keeps the knee stable, and straps that stop bones moving at the side if the knee. Nighttime-I have not worn in bed. I also use a pillow ..but have found a memory foam one is much better than a normal one 