Vesture Microcore 8" x 12" x 1" Heavy-Duty Thermal Hot or Cold Pack - 40 oz.

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

This has saved the day numerous times. best part it can replace ice in coolers which makes clean ups much easier, since not having to dump anything out. TO heat i prefer the boiling water method, gets it very hot.

I use these for a school lunch catering company. Initially these worked great, they hold the heat very well. However, over past six months, I have had to continually order more because they develop leaks. I am hoping to find a brand that will last longer.

Love these. Thin and keeps cold longer than the nordic ones.

I have used this product for over 8 years, for both cooling and warming. None have sprung leaks, and I suspect overheating causes the leaks. Based on 1000 watt microwave power, I heat them at 75% power for 45 seconds, let rest 1 minute, then another 45 seconds. Freezing is simple, but when they are flexible stack them carefully, as if you stack them more than 3 tall, some may not freeze completely.

Reusable, and non-toxic, the Microcore thermal hot or cold packs add reassurance, on long trips, that proper temp. is maintained. Recommend this product for it's quality and price.

Fit nicely in a half-size delivery bag, and kept our food hot for several hours during my daughter's grad party. I was actually surprised that nothing had to be discarded for holding temp at the end of the party!

These are perfect out of the freezer to keep items cold for hours. When you heat them in the microwave they are great at keeping hot food hot.

Haven't used them frozen yet, but it would have been nice to get some kind of instruction sheet to let me know how long to microwave them. Had to play around with timing and still not sure what the maximum heating time and temp are. They worked great in the Cater Gator but wish I would have heated them longer.

I used this in my catering containers. They were wonderful. My desserts stayed cold for hours. They were of good quality and i have no doubt will last a long time.

I love these hot packs. Not only are they available in different sizes which fit our delivery bags perfectly, they keep our foods hot for the 20-30 minute drive we make to deliver our food hot to our customers!

I used this in my catering bags. They were wonderful. The food stayed hot for hours. They were of good quality and i have no doubt will last a long time.

This is the second one I bought, even though it’s smaller that the first one I like how it’s actually thicker. I found this to hold heat a little longer than the other one.

Was worried about condensation. But this keep everything cold during transport and I had no worries. Freeze the night before and they are ready to go.

This thermal hot or cold pack is worth the purchase. It definitely keeps drinks cold for a long period or even keeps your food warm for a long period of time!

One of the best products ever invented! This item can be frozen or heated and holds temps for a long period of time. A must have in every kitchen!

These are quality ice packs that hold a freeze for hours or heat to very hot in a matter of minutes to keep foods hot.

We use for our pies when we are at farmers markets selling. They keep pies chilled for the 4 hours we are in heat. Great value

I purchased 2, to be used for hot and cold. 1 for hot and 1 for cold. Used them at the same time. KEPT MY FOOD WARM and KEPT MY DRINKS AND SALSA COLD. Very fast to heat up and stats hot for a long time. Gets cold in minutes and both are flexible. I had to look up for instructions, does not come with any.

We were using this pack for keeping our hot box warm while loading it up with our food. It works okay. Have not used it as a cold pack but have no doubt it would work great.