I have been using these cold packs, and other products by this manufacturer, for over 15 years, ever since my physio therapist explained to me why she uses them in her medical practice. These last longer than their competition, and I think they might even hold their cold longer, too. I have tried a few others; the lighter blue packs work, too, and cost a bit less, but they don't seem to hold up as well as the darker ones. But eventually, all these cold packs will spring a leak, and will have to be tossed -- especially if you continue to put any weight on them. Overall, I rate these highly, and would recommend them. They're certainly worth trying for your sore neck, back, knee, etc.
Rating:
[5 of 5 Stars!]