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“UnderCool is a game changer.”

“One frustrating fact of cooling vests is that they tend to be bulky, clunky, heavy, and most announce their presence like a 6-pound cyst growing out of your neck. People don’t want to stare or ask questions… but then they stare and ask questions. ThermApparel is flipping the script and has designed a vest—the UnderCool—that is virtually completely hidden, weighs less than two pounds, and lasts longer than many of their larger, full-vest competitors.”

Dave Bexfield

“It’s awesome and helps me get out of the house.”

“I’m a 49 year old women with progressive MS. This vest works fabulously. I live where the heat reaches 105°F+. So I can honestly say this vest helps immensely. But overall it’s awesome and helps me get out of the house.” 


“It doesn’t call attention to my MS.”

“This company, made up of only three dedicated peeps, created (THANK YOU) a cooling vest that fits like spanks and doesn’t call attention to my Multiple Sclerosis! And I keep finding new ways to use. The latest is-playing my ukelele on my porch! People who’ve had chemo, or have Lupus or other chronic diseases can benefit from it as well. God bless you! It’s a blessing! Thanks ThermApparel!” 

Jamie Tripp Utitus

“I was able to attend Country Thunder Outdoor Music Festival.”

“Thanks to my vest, I was able to attend Country Thunder Outdoor Music Festival this weekend. MS wasn’t slowing me down and making me miss out on some great country music thanks to ThermApparel. P.S. I’m the blond.” 


“I am able to battle the hot summer days doing what I love.”

“I have MS but it doesn’t have me. Thanks to my ThermApparel cool vest, I am also able to battle the hot summer days with my boy, doing what I love, rein, cowhorse and cutting!!!”


“It kept me from melting entirely!”

“Got my Kung Fu punch, my Limoncello cocktail and my lobster roll all traditional favorites. Also saw 98°F (in 98°F heat) so thank God for my ThermApparel cooling vest (that you can’t even see in this pic) that kept me from melting entirely!” 


“It helps to keep me cool during class and is nice and light.”

“12 years into my MS I feel like I know all of the tricks. Before and during class I’m rocking my cooling vest under my tank top. It helps to keep me cool during the class and is nice and light. It helps cool me down faster so I can walk normally again and help me workout longer by allowing me to keep feeling my feet. Thank you ThermApparel!” 


“I can continue to cycle and not be laughed at from fellow enthusiasts.”

“I began putting frozen water bottles in my jersey for long rides. This allowed me to ride hot southern days including humidity. Along comes my diagnosis of MS and the enemy of heat. Without my accidental (lots of ice in the back pockets) of my cooling jersey, I would have to give up riding. But, Thanks to your company’s cool vest, I can continue to cycle and not be laughed at from fellow enthusiasts. Discreet, effective and lightweight. Wahoo, thanks team! Now come up with cooling insert for my helmet!!!!”


“I have MS and wear it when I go running.”

“Lightweight and easy to store in freezer. I have MS and wear it when I go running - works well.


“I was able to walk much further in the heat!”

“Me and Dizzy really love our vest! It means we can now go out and about in the hot weather without worrying so much about getting too hot. And as we’re trying to be a bit more active and do more exercise, it’s also amazing for helping us to keep cool during these times too. We wore it for the first time to Hastings last weekend and had a lovely time. I was able to walk much further in the heat! We went in the shops, had a walk along the beach and even went on a little mini steam train.” 


“It’s been a total lifesaver.”

“If you are going to own just ONE thing to make your life with some ridiculous chronic illness, it must be THIS cooling vest! First of all, I can appreciate that it is not one of those bulky cooling vests that make you look like you are preparing to board a life raft. Secondly, this baby keeps me cool for up to 6 hours in the sweltering heat of Florida. It’s been a total lifesaver. It’s super comfortable, and I’m way grateful that I can wear something that is unnoticeable under my clothes and also keeps me from having a heat-related flare-up!”

Lisa Marie

“I can enjoy my garden again!”

“Love it! Love it! Fits great. After years of not being able to enjoy working outside with my MS, I can enjoy my garden again. Thank you.”

Happy Amazon Review

“UnderCool helps me keep up with my grandchildren.”

“I have been living with MS for over 20 years and I’ve worked very keep to keep it from coming between me and my family. For years we avoided traveling in the summer because I couldn’t handle the heat. I avoided other cooling vests because they were too big and bulky. The second I saw UnderCool I knew it was perfect for our next trip to Disney World! I was able to spend just as much time out in the sun as my grandkids, I love it!” 


"Never thought I would wear a cooling vest and like it.”

“Our house is well shaded and tends to stay cool in the earlier half of the day, but by 3 or 4 in the afternoon, it’s pretty toasty. I try and get house and yard work done in the mornings, but there is often more to do, and I have to wimp out. But putting the vest on in the afternoon to go out and weed the garden, paint the front door, or even try and tackle the infamous laundry pile really helps. I have been impressed with the vest and much to my surprise I have been using it on a regular basis!”

Meg Lewellyn

“UnderCool is 100% better than the bulky outer cooling vest I have been using!”

“I don’t have to remove the cooling packs to refreeze! I just roll up the whole vest, slim cooling packs and all, into a package about the size of a sandwich, and pop it into the freezer for a couple hours. It will even freeze the cooling packs solid in the refrigerator if there isn’t room in the freezer. I can get the vest on and off with no problems despite my MS affected hands, and it is incredibly light. I could wear the vest under my shirt and have it disappear completely, but I generally wear it over a t-shirt so that I can easily toss it into the freezer while I am at home. In every way, a great improvement in cooling technology!”


“The vest has allowed me to enjoy outdoor activities.”

“Many thanks to you for providing me with the UnderCool vest. I have been diagnosed with relapsing/remitting MS, as a result I have been advised to stay in temperatures below 75˚F. The vest has allowed me to enjoy outdoor activities that I otherwise would not have been able to attend. Most recent my grandsons high school graduation party. That day temps soared above 90˚F. As the party was in an outdoor shelter, I was very grateful for the cool vest! I was able to enjoy conversations with family & friends while remaining cool! Again, thank you so much, sincerely and with gratitude!”


“You've given me my Florida summers back!”

"Guys, I just want to say THANK YOU SO MUCH for your cooling vest! I’m MS heat intolerant, so since my diagnosis in 2016, I hibernate in the summer. No more! Yesterday I wore the vest to Epcot on a 95°F day and I was perfectly comfortable. The vest is cool, cute (hey, I’m still a girl), lightweight and even gave me the added bonus of lumbar support during our 5 mile excursion of the park. I’m so grateful!"


Questions about our vests or shipping? Reach out to the ThermApparel team toll-free at 855-232-7233, write to us through our website’s contact form or chat with us via live chat. We always respond because, otherwise, that wouldn't be cool.