Great Product
These work very well. I keep it in the freezer wrapped in a towel so it is ready whenever I need it. I have had two and used to get them from the Chiropractor's office for a bit more. They have lasted several years before they degrade. It looks like crystals inside the gel and looses its flexibility and cooling capacity. Is it air or moisture? I can't tell. Overall, I love them. I would like them to last longer.
Rating: 4 stars