amazing contraption Harley got for cooling his knee.
As I was trying to write the description of how the cool pack works it seemed easier to show you how it works.
I love the way the cuff so simply uses gravity to move cool water in to the cuff, then allow the tissue to cool, and when the water warms up, let it drain back in the reservoir. Once the water enters the thermos type container it only takes a moment to be cooled by the ice in the receptacle and it is ready to flow back into the cuff. Hopefully, you will find this as interesting as I did.