Best Selling Cooling Products
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UnderCool 3
Regular price From $199.99Regular price -
RallyWrap
Regular price From $249.99Regular price -
UltraCool
Regular price From $319.99Regular price

Stay cool, comfortable, and in control, empowering you to live life to the fullest by helping to...
- reduce fatigue
- beat cog fog
- enable exercise
- explore the world
Ruth’s Cooling Choice:
UnderCool 3 w/two sets of ExtendedCool Cooling Packs
Don’t Just Survive the Heat
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Stay Cool Anywhere
Works great in humid and dry climates
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Cooling That Lasts
Cooling packs last 1-4 hours depending on product
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Stay Energized
Lightweight cooling power that won’t drag you down
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Feel Great
4-way stretch comfortably fits all bodies and moves freely with you
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Stay in the Game
Ultrafast recharge times and 1000 reuse’s mean you’ll always have cooling
These are not AI Generated People. They are Real Customers!

Easy To Use
Cool It
Place in the fridge, freezer or ice water
Wear It
Insert cooling packs into the pockets
And Go
Anywhere you want, doing anything you want

As seen on ActiveMSers.com
TOP PERFORMER: ThermApparel UnderCool
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. ThermApparel is flipping the script and has designed a vest that is virtually completely hidden, weighs less than two pounds, and lasts longer than many of their larger, full-vest competitors. The UnderCool is ultra lightweight and stretchy, think sheer (and comfy) yoga pants, and comes in a range of sizes and two colors (back or white), cinching at the abdomen with Velcro. Perfect for sports, especially those that involve running. Cooling comes from four phase change (PCM) cooling packs that are inserted into the back of the garment—there is no cooling on the chest. We expected this to be a noticeable negative, but in our testing we still felt refreshed. And a huge side benefit of no cooling packs on the chest: there are no cooling packs on the chest so women (and men) of all chest sizes can wear this comfortably and stealthily. Expect the slim version to last 1-2 hours outdoors on a hot day, 2+ hours when worn indoors. The extended cooling packs add up to an extra hour of cooling power, and is a recommended upgrade.
Weight: SlimCool Packs - 1.3 lbs, ExtendedCool Packs - 1.9 lbs
Why We're Better
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Evaporative Cooling
- Doesn't work in humidity
- Cools your skin, NOT your core directly
- Lightweight & Flexible
- Must be wet
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Our PCM Cooling System
- Works in any climate
- Cools your core body temp
- Lightweight & flexible
- Dry conformal cooling
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Gel & Ice Cooling
- Works in any climate
- Too cold for direct skin contact
- Heavy & rigid
- Wet from condensation
Cooling Gear
- Don’t Just Survive the Heat
- Thrive In It!
- Don’t Just Survive the Heat
- Thrive In It!
- Don’t Just Survive the Heat
- Thrive In It!
- Don’t Just Survive the Heat
- Thrive In It!