Help knee pain with the Dr. Smiths Self-Heating Knee Support Pads Designed to provide heat and support to the knee Self-heating - produces heat after 20-30 minutes of being placed on the knee Can be worn under clothes Great for painful knee injuries - helps soothe pain One size fits most Buying Options 9.99 pounds instead of 14.99 pounds for 1 x pad - save 33% 12.99 pounds instead of 24.98 pounds for 2 x pads - save 48%