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UltraCool

$319.99
$319.99 $319.99
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FREE SHIPPING & 60 DAY NO HASSLE RETURNS

UltraCool is our most powerful vest, featuring 360-degree cooling with packs in both the front and back for whole-body temperature relief.

Whether you're managing severe heat sensitivity, MS, lupus, fibromyalgia, POTS, or menopause, or you're a theater performer, rigger, mascot, cosplayer, fursuiter, Santa, outdoor worker, or just someone who needs serious cooling for gardening, home projects, or life in the heat, the UltraCool was built for you.

With adjustable straps and up to 3-4 hours of dry, consistent cooling with no condensation or soaking wet clothes, it's trusted by thousands across the US for work, performances, events, and everything in between.

  • 360-DEGREE COOLING: Cooling packs in both the front and back deliver whole-body temperature relief that other vests simply can't match.
  • MADE TO FIT YOUR BODY: Made with 4-way stretch and Breathoprene so you can adjust it to fit your body multiple ways, with adjustable straps for a flexible, secure fit.
  • DO MORE OF WHAT YOU LOVE: 3-4 hours of cooling time with included ExtendedCool packs. M/L holds 8 packs, XL/XXL holds 10.
  • STAY COOL AND DRY: No condensation or soaking wet clothes like ice or evaporative vests. Just dry, consistent cooling.
  • KEEP COOL NO MATTER WHAT: Our PCM cooling packs work in both humid and dry heat.
  • COMFORTABLE FOR ALL BODY SHAPES: 4-way stretch fabrics and lightweight, articulated cooling packs provide a flexible, secure fit.
  • EASY TO USE: Recharge your ExtendedCool packs in the fridge, freezer, or ice water in 20 to 60 minutes.
Garment Facts:
78% Nylon, 13% Spandex, 9% Breathoprene
Care Instructions:
Garment: Machine wash cold with like colors. Do not bleach. Do not use fabric softeners or dryer sheets. Dry flat. Do not iron.
Cooling Packs: Do not machine wash, they will explode...trust us, we've tried, and it's a huge mess. Clean with mild dish soap and water.

FAQ

Q: What size UltraCool should I order?
A: Sizing is based on your natural waist measurement, not your shirt, dress, or bra size. Most people wear a smaller size than they expect.

For example, if you typically wear a 2XL shirt or have a larger chest, you may only need a M/L UltraCool. The vest is designed to give you a comfortable, snug fit, like a compression garment or Spanx. What matters is your waist, not your cup size or clothing size.

Sizing Tips:
  • Find your natural waist. It's below your rib cage but above your belly button.
  • Measure against your skin.
  • Take your measurements in front of a mirror to make sure the tape is level.
  • If you fall between two sizes on the chart, size up.

Size Natural Waist (in) Natural Waist (cm) Cooling Packs
M/L 32" to 45" 78cm to 101cm 8 packs
XL/XXL 45" to 64" 101cm to 129cm 10 packs

📏 Still have questions? Check our Sizing Guide, jump on live chat, or call us at 585-204-0841. We're happy to help you find your perfect fit.

Q: What makes UltraCool different from UnderCool 3?
A: UltraCool is our most powerful vest. It features 360-degree cooling with packs in both the front and back for whole-body temperature relief, holds more packs (8 for M/L, 10 for XL/XXL), and delivers longer cooling of 3 to 4 hours per set. If you need maximum cooling for intense heat, demanding activities, or severe heat sensitivity, UltraCool is the upgrade.

Q: How does the UltraCool work?
A: Think of it like a heat exchanger. The PCM cooling packs sit against your torso front and back, pulling heat out of the blood flowing through vessels close to your skin. Your body then circulates that cooled blood back through your entire system, bringing your core temperature down from the inside out and cooling you from head to toe. Learn more about how our cooling packs work in our cooling pack guide.

Q: Can I wear it under my regular clothes?
A: UltraCool can be worn under clothing, though because the cooling packs circle your torso front and back, it is slightly more visible than an under-clothing vest. For a fully concealable option, check out the UnderCool 3.

Q: How long does the cooling last, and how do I recharge?
A: ExtendedCool packs provide about 3 to 4 hours of cooling per set, depending on ambient temperature and activity. To recharge: about 20 to 30 minutes in ice water, 40 to 60 minutes in a freezer, or 60 minutes in a fridge. For all-day cooling, consider the UltraCool Double Pack Bundle so you can swap sets while one refreezes.

Q: How do I care for the garment?
A: Machine wash cold with like colors. Do not bleach. Do not use fabric softeners or dryer sheets. Dry flat. Do not iron. For the cooling packs, do not machine wash, they will explode...trust us, we've tried, and it's a huge mess. Clean with mild dish soap and water.

Q: Do you ship to my area, and how quickly will it arrive?
A: If you order before noon Monday through Friday and items are in stock, your order ships the same day. Free shipping within the USA. Worldwide shipping available from Rochester, NY.
Size: M/L
Black ThermApparel UltraCool showing multiple cooling packs on a white background
$319.99
$319.99 $319.99

UltraCool M/L - 8 cooling packs

UltraCool XL/XXL - 10 cooling packs
  • M/L Weighs 3.6lbs
  • XL/XXL weighs 4.5lbs
  • 78% Nylon/ 12% Spandex/ 9% PU FOAM

Please review our sizing chart below to ensure the best fit for your UltraCool

Size Natural Waist (in) Natural Waist (cm)
M/L (comes with 8 cooling packs) 32" - 45" 78cm - 101cm
XL/XXL (comes with 10 cooling packs) 45" - 64" 101cm - 129cm

 Sizing Tips:

  • Sizing is based on your natural waist, not your hips, pants, chest, or cup size
  • Measure against your skin
  • Take your measurements in front of a mirror to make sure it is level
  • UnderCool should fit your body like a glove to give your the best cooling

    Reuse 1000’s of Times

    • Recharge 60 min in fridge, 45 min in freezer, & 30 min in icewater.

    Cooling Pack Care:

    • When not in use, store Cooling Packs in a fridge or freezer.
    • Do not leave Cooling Packs in a hot environment like a car.

    Washing Instructions:

    • Machine wash cold with like colors
    • Do not use bleach, fabric softeners, or dry sheets.
    • Dry flat, do not iron.
     

    Non-Toxic Bio-Based Phase Change Material (PCM)

    Freezes at 70F (21C) so its safe against the skin. Unlike Ice.

     

    Works in humid & dry conditions

    Cooling lasts 1-3 hours depending on cooling pack type & environmental conditions

    Won’t condensate so you will stay dry

    Recharges in 15-60 minutes

    Can be used 1000’s of times for around 3 years

    What clients say

    • The vest is awesome!

      Ten minutes in to a regular fursuit photoshoot id be sweating, but we were talking photos for 2 hours and I didnt break a sweat. Its also really lightweight and comfy and at one point I forgot I had it on

    • Big thanks for the ThermApparel cooling vest!

      Lowered core temps by a FULL 3 degrees from the am race (no vest) to the afternoon race (with vest) and ten degrees warmer ambient. Couldn't wait for the am race to be over. I could have gone double the laps in the afternoon with the vest. It works, period!

    • Love my Cooling Vest, never have to worry about overheating again. It's so slim it's invisible under my vest or Santa Coat. Keeps me cool during those home visits sitting near the fireplace or in the hot sun at the Christmas in July events. My TherApparel Cooling Vest will always be part of my Santa Outfit, summer and winter.

    Why We're Better

    • Evaporative Cooling

      • Doesn't work in humidity
      • Cools your skin, NOT your core directly
      • Lightweight & Flexible
      • Must be wet

    • Our PCM Cooling System

      • Works in any climate
      • Cools your core body temp
      • Lightweight & flexible
      • Dry conformal cooling

    • Gel & Ice Cooling

      • Works in any climate
      • Too cold for direct skin contact
      • Heavy & rigid
      • Wet from condensation