Arma Hot/Cold Joint Relief Boots Black. The Arma Hot/Cold Joint Relief Boots are a multi-purpose, comfortable boot perfect a variety of problems such as:- Treating injuries Speeding up recovery after exercise Minimise swelling and inflammation Relieving pain Relaxing tight muscles Encouraging blood flow Helping arthritic conditions The Arma Hot/Cold Joint Relief Boots contain gel packs that can be heated via hot water or the microwave or cooled in cold water or the freezer. Designed with comfort in mind these boots are versatile enough to fit most joints as the flexible neoprene have cut out sections to allow for movement. Read more… The Hot/Cold Boots are suitable to use on the knees, hocks and fetlocks and are easy to clean. The Arma Hot/Cold Joint Relief Boots perfect for any medical kit!