Using tourmaline infused patches to release negative ions, Rambo Ionic Supports combine the benefits of compression and negative ion therapy in their range of joint and body supports. These can help to increase circulation, stimulate metabolism, increase oxygen delivery to cells and tissue, strengthen the immune system, restore pH balance, reduce blood pressure and remove toxins from the body. Sizing: Small - may suit slim, lightboned frames. Medium - may suit stronger-built frames. Compression supports will feel firm and it is at each individuals discretion what feels acceptable.