Magnetic Knee Support

For-Knees is a magnetic knee support with compression and its infrared warmth can help reduce pain and improve your quality of life. Their knee braces are made from a stretchable and breathable blend of cotton yarn, latex yarn, and tourmaline fiber for maximum comfort.
https://www.amazon.com/ForKnees-Knee-Braces-Magnetic-Compression/dp/B00RXT80MG/