Good size, flexible. The 5" x 10" size just fits inside a gallon plastic zip type bag. You can fit in two for larger areas like your back. The gel makes them flexible for use on different areas of the body, yet they get cold enough to use to keep food or medicine cold during transport. Good size cold pack for the wrist or head, too. I use them mainly as cold packs, but I gave two to a friend with back problems, she uses them hot or cold as needed and likes the flexibility of the gel rather than as a solid piece.
They perform as advertised. They stay cold longer and are large enough to cover a larger area than most cold packs. I would highly recommend this product for pain relief.
After knee replacement this little machine made recoup so much easier. It stays cold for a couple hours (so hubby could go to work and leave me to recoup!). It could help a lot of people and was well made.
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