Am going thru re-hap for a total hip replacement and the facility uses your products. I was so impressed with the results after a workout that I bought the two products from you that they were using on me. I will start just doing my rehab at home next week and will be using the Col Pac's after my home routine. Sure beats fussing with the solid ice packs that I have used for my hip & back over the past few years. A great product! Thanks!