Not using your ThermApparel UnderCool Cooling Vest during the winter months?

Wondering about proper storage? We've got you covered. 

Even though it's cold outside you still can overheat when you exercise, shovel snow or play with the kids and your Cooling Vest will help your fatigue levels and cog fog attacks. But, if you just don't use your Cooling Vest during the winter months here is the best way to store it until you need it again. 

Short Version - 30 sec.

Longer Version

Video Translation:

"Here's how to get the most out of your cooling packs during the offseason. Put them into a plastic bag, or you can easily even use a plastic grocery sack. Then all you need to do, put them in the freezer. Tip: make sure that they lay flat, otherwise they'll freeze in funny shapes. But, if they do, you just pop them into some warm water until they melt a little bit or get squishy, straighten them out, put them back in the freezer and then they are ready for you when the weather gets hot."

Long Version with lots more useful info - 2 min.

Video Translation:

"Hi everyone, this is Julia. We're going to talk about how to store your under cooling vest today. Now there's a couple of different ways that you can do it. The cooling packs are really awesome, they will refreeze in the fridge, the freezer, or ice water. But, if you're going to store it for long periods of time, or sort of the end of the season, the best thing to do is just to keep it in your fridge or your freezer, and you can just fold it up accordion style, like how it came to you in the box. And my suggestion is just get a plastic grocery sack. Like that and just put it into your freezer. Now, we do get questions about "well can I leave it in there for long term?" Yes, you can leave your cooling packs in the freezer or the fridge for very long periods of time. In fact, that's the best way to store it over the holidays, over the winter, or if you're not going to be using it for a period of time. And then we get questions about the vest itself can I leave the garment in the freezer itself? You can, it won't hurt the spandex or the mesh. It just kind of depends on the settings of where your freezer is. Sometimes you can get some frost burn or some ice crystals that build up on it. This is one that we've had in the freezer all year long, and it's in pretty good shape, it does have a little bit of freezer burn back here. That's because they didn't have it in a bag it was just sitting in the freezer itself. So, when you're cooling packs are liquid, toss them into your freezer your fridge, keep them in their solid state and you'll get the best longevity out of them. And you can also just pop them into like a Ziploc bag, put them into your fridge and freezer and they can stay there for months at a time. Now also take this into consideration: you don't have to deep storage or long storage or vest over the winter. You can actually use it during the wintertime. Use it when you exercise. If you exercise in the house or if you go to the gym, or even when you're snow blowing. It gets really hot while you're shoveling the snow or skiing. We have people that use it while they're skiing. So keep in touch. Let us know what you use your vest for and if you have any questions you can always reach out to us."


  1. Take the Cooling Packs out of the UnderCool Vest Garment. 
  2. Put the Cooling Packs into a plastic bag. A plastic grocery sack or a ziploc works great. (we have one customer that uses a plastic bacon box.)
  3. Store the Cooling Packs in your fridge or freezer. You can leave the Cooling Packs in the fridge or freezer for an indefinite amount of time. It will not hurt them and is the best way to store them when not in use. 


What if I don't have a plastic bag?


You can store the Cooling Packs in the fridge or freezer without the plastic bag. The plastic bag is helpful to keep all your Cooling Packs together in one place so you don't lose them and they won't get stuck to a long forgotten frozen tasty snack in the way back. 


Can I use a box?


Yes, you can use any type of container that works with your freezer or fridge.


  1. Remove the Cooling Packs (see above for cooling pack storage)
  2. Wash the UnderCool Vest Garment - either by hand or washing machine
  3. Air dry - don't use the dryer
  4. Store with your exercise clothing, swimsuits, or other summer attire so you will be able to find it when the warm weather arrives.  


Can I leave my vest in the fridge or freezer?


Yes you can. The cold doesn't hurt the vest garment but with long term storage the garment can absorb freezer odors and get ice burn if it's not in a bag. 


Avoid using a hanger for long term storage as it will make the UnderCool Vest Garment stretch over time. 


  1. Locate your Cooling Packs in the depth of the freezer or fridge. (This is also a good time to do a quick inventory of freezer food in preparation of BBQ season!)
  2. Check for frozen tasty snacks stuck to the Cooling Packs, then choose the appropriate course of action below. 
  • No frozen tasty snacks attached - Slide them into your UnderCool Vest Garment and you are good to go. 
  • Yes there is a frozen tasty snack attached - Rinse the Cooling Packs with warm water until all frozen tasty snacks are gone. Squish flat and refreeze your Cooling Packs (tip: try the plastic bag trick)


My Cooling Packs are in funny, lumpy shapes. What do I do now?


If your Cooling Packs are in funny shapes - run them under warm water until they are squishy. Reshape to lay flat and refreeze. Wait 60 min. then slide them into your UnderColl Vest Garment and you are good to go. 



ThermApparel is a small business making big waves in the heat sensitivity world by designing the first lightweight, comfortable and invisible cooling vest, UnderCool. Check us out online, on our blog, or on FacebookTwitter, PinterestLinkedIn and Instagram.

Please let us know if you have any other questions or ideas in the comments below, we will follow up. You can always reach us via:

Live Chat -  |  Email -  | Phone - 855-232-7233 |  Address: ThermApparel LLC. 40 Franklin St. 4th Floor, Rochester, NY 14620

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  It's not about feeling cold. It's about feeling good.