For use under bandages to give you all the benefits of our Rambo Ionic® Technology. Polycotton outer. Tourmaline powder infused printed inner. Tourmaline is a naturally occurring crystal that releases negative ions that improve the hydration capacity of the blood by causing a change of the water in the horse's body. This change allows for improved circulation, aids increased delivery of oxygen and removal of toxins from the body. 400g fiber filled.