It seems that the signature red suit is great up at the North Pole but designed poorly for all of our heated malls and virtual visits.

Do you have problems with concentration and fatigue from the long hours in the suit, sitting under hot lights while the glow from the computer monitor heats you up, or the warmth from the Mall? Our cooling vest will help you keep you cool, and your concentration. By wearing a ThermApparel UnderCool Cooling Vest, your core temperature will not spike helping you to keep your concentration strong and fatigue low so you can make each visit as memorable as possible for the kids. It's not about feeling cold, it's about feeling good.

I'm a big Santa. Do you have big sizes?

YES! We have 5 sizes - Check our sizing page for all sizing info and a video explaining how to get the correct fit.
XXL fits a natural waist of 51"-64"
Large fits a natural waist of 40"-51"
Medium fits a natural waist of 31"-40"
Small fits a natural waist of 24"-31"
XXS fits a natural waist of 18"-24"
If you fall in between the 2 sizes order the larger size.
If you need help with sizing give us a call 855-232-7233. We are happy to help.

How do I order a cooling vest?

Go to our shop page, select your size and cooling pack type, enter your address and credit card info and we will ship it to you.
If you need help placing an order give us a call at 855-232-7233. We are happy to take phone orders.

How do ThermApparel Cooling Vests keep me cool under my red Suit?

Our cooling vest is a PCM Cooling Vest, not gel or ice. PCM works better than gel and ice. Why is that and why is it important?

  • When your body is hot your blood vessels open up to allow heat to be released. In other words, you sweat and when the air hits your sweat it cools your body down.
  • Ice and Gel Packs cause blood vessels to constrict, preventing cooled blood from reaching your core. Ice is wonderful for cooling down a specific part of your body or bringing down swelling, but it doesn't cool your entire body. There is a reason doctors say 20 min on and 20 min off with ice packs. You need your blood vessels to open back up to allow the blood to start flowing again.
  • ThermApparel PCM Cooling Packs cools the blood without constricting your blood vessels. As your blood flows past the PCM Cooling Packs they cool your blood and your body keeps pumping cool blood through your system keeping your whole body cool.

Will it be comfortable while seated?

YES! Pilots and race car drivers have worn our product with great results. It's so comfortable, most people forget they have it on.

Will it interfere with the sizing of my red suit?

Because our cooling packs are in the lower back area and are worn directly against the skin and their low profile design It won't cause you to need a larger red suit size than you normally wear.


When someone sits on my lap will they know I am wearing it?

Nope. UnderCool has a velcro closure right over your belly button and with its low-profile design it won't add any bulk to your red suit. The cooling packs are in the back so no one will notice.


How long will it keep me cool?

YES! UnderCool will last for 90 min to 3 hours depending on your choice of pack. Our SlimCool Packs last 1-2 hours and the ExtendedCool Packs last 2-3 hours. If you need it to last longer the packs can be refrozen and placed back in the vest, or you can purchase additional cooling packs. The cooling packs can be doubled up in the vest to make them last longer, but this will add a little more weight and bulk to the vest on your back.

The unique thing about our packs is their recharging time and ability. the packs can refreeze

  • ice water in 20 min
  • freezer in 40 min
  • fridge in 60 min

The frozen cooling packs can be placed in an insulated cooler and they will stay cold for a few hours until you need to switch. 

shop Santa cooling vests

White Festival Bundle


Our most popular package. Signature UnderCool Cooling Vest with 2 sets of cooling packs. Double up the packs for extra cooling time.

Black Festival Bundle


Our most popular package. Signature UnderCool Cooling Vest with 2 sets of cooling packs. Double up the packs for extra cooling time.

Don’t just take our word for it...


Santa Ed Taylor - Worldwide Santa Claus Network



Santa Michael - Mitten State Santa


Santa Val


Santa Jim


Who will be our next Santa??? Will it be you?

We would love to know about your experience with the UnderCool Cooling Vest. Send us your testimonial. 



It seems Santa wants all the same things from cooling apparel that the rest of us want. Santa Ed Taylor had lots to say about our vest when he tried it.

Santa Rick Rosenthal from the Northern Lights Santa Academy has tried cooling vests in the past without much success. He tried the UnderCool Cooling vest and said it was "surprisingly very light and comfortable."

Check out our Santa Page for more info.

If we can answer any more questions just ask ...... 855-232-7233

ThermApparel is as always about getting out and doing. We are doing our best to help people get the most out of life and we can't think of anything better than helping all the Santa's out there.


 Shop Santa Cooling Vests        Santa FAQ 

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 Facebook, Twitter, Pinterest, LinkedIn 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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