I didn't give these a five star as they are not the easiest items to figure out. For cold use, just throw them in the freezer, just as any other cold pack, However to use for heat they are rather more difficult to figure out. they do not come with any instructions to heat up. ie. How long do you microwave them for! There seems to be no instructions online, so it's just trial and error. I've actually found that Nuking them at half power for longer is better than high power as they seem to heat more evenly. The only instructions I found online had me heat them for 2 mins on High. This did very little. I nuked them for about 6 mins on Medium, they worked much better that way, but I guess it depends on the Microwave. It Read More
Thank you for your review, Stuart Anstead! We are sorry about the trial and error you had to perform on this Microcore 8 inch x 12 inch x 1 inch Heavy-Duty Thermal Hot or Cold Pack - 40 oz. Our Customer Solutions team has been notified of this instructional issue. Please reach out if you have any questions!
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