"Your product was an integral part of my recovery from double knee surgery. In the absence of the Active Ice® System, I do not believe that my overall recovery would have been as successful. I cannot think of a viable substitute. After several weeks post-surgery, I was sold and contacted Polar Products to acquire one of my own. I'm so glad I did. My recommendation: Buy one of these units to facilitate recovery. You will not be disappointed!!" - Steve K.