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“lowered my core temperature
by a full 3 degrees”
COOLING VEST OF CHOICE:
ThermApparel Adventure Bundle
Med. Black/White, ExtendedCool Packs
benefits of UnderCool
- Improve performance
- Reduce fatigue
- Keep your focus
- Faster recovery
UnderCool works by absorbing heat away from your body in a lightweight, long-lasting, and comfortable cooling vest.
how does it do that?
Unique Garment Design
UnderCool vest uses 4 way stretch for a snug fit and strategically placed cooling packs for comfort and concealability.
Advanced Cooling Technology
ThermApparel Cooling Packs take into account human physiology, freezing at the perfect temperature to cool your core body temperature and work with your body's natural cooling system.
more ways to use
prepare
Wear 30-60 min before activity and start with a cooler core for more peak performance.
perform
Wear under your favorite outer layer of clothing to reduce your heart rate and heat strain.
restore
Slip on easily after your workout to cool down quickly and reduce stress on your body.
Trust in Us! 60 days to try.
If a cooling vest remains in your closet because you are too embarrassed to wear it, well, then it's of zero help. Invest in your health and happiness with a durable, comfortable cooling vest. To prove it ThermApparel has a 60 day exchange/return policy for a full refund less shipping provided the vest is returned in like-new condition.
Getting the Perfect Fit
To get the maximum cooling effect from a vest, it should fit snugly around your body.
stay strong. no compromises needed
lightweight
flexible
fitted
1 - 3 hours cooling time
SlimCool Packs 1-2 hours cooling time.
ExtendedCool Packs 2-3 hours cooling time.
slim fitting, easily transportable
7 sizes and 2 colors. Adjusts to fit a wide variety of body shapes and sizes. No zippers or snaps.
machine washable
Mild detergent, cold water, air dry.
safe effective cooling temperature
Cooling Packs freeze at 70°F/21°C. Not too cold or too hot. It keeps you comfortable and works with your body's natural cooling.
lightweight, comfortable, reusable
SlimCool Packs Weight - 1.3 lbs.
ExtendedCool Packs Weight - 1.9 lbs.
4-Way Stretch Fabrics
Provides comfort and optimal cooling.
Did you know?
ThermApparel Cooling Packs freeze at 70°F / 21°C working with your body to improve cooling. Other cooling products, which use ice or colder PCMs, can cause blood vessels to constrict. This prevents the cooling from reaching other parts of your body and can cause your core to heat up by preventing the flow of blood to your extremities.
“I didn’t overheat at all and I still felt good”
testimonialsGene
BRAGGING RIGHTS:
76 weeks with a 100+ mile bike ride
COOLING VEST OF CHOICE:
ThermApparel UnderCool
XS Black, ExtendedCool Packs
Why cooling is important?
Your body is always producing heat. It's up to your heart and blood vessels to get that heat away from your core organs. Using a ThermApparel Cooling Vest makes life easier on your heart, keeping you safe and giving you more energy for what you care about.
four ways to refreeze and store
Did you know UnderCool cooling packs freeze at 70°F/21°C? This allows for lots of ways to refreeze and store.
Refreeze quickly in a cooler with ice water for a cool 32°F / 0°C
Cooling packs will refreeze in ice water in 15-20 min.
Store in the freezer for a brisk 0°F / -17°C
Cooling Packs refreeze in 45 min. Safe to store in the freezer for long-term, if not wearing right away, taking to an event, or needing the extra few minutes of cooling.
Store in the fridge for a cool 40°F / 4°C
Cooling Packs refreeze in 60 min. Safe to store in the fridge for long-term. Cooling Packs will be at a comfortable temperature to put on right away.
Store in A/C for a mild 68°F / 20°C
Cooling Packs refreeze in 8-12 hours. They may not feel cold to the touch but they are working to keep your core cool.
“I used to dread playing tennis in the heat, but now I don’t give it a second thought”
testimonialsLinda
COOLING VEST OF CHOICE:
ThermApparel Adventure Bundle
Small White, ExtendedCool Packs
frequently asked questions
1. How long will an UnderCool keep me cool?
Cooling packs will stay cold for 1-3 hours depending on your level of activity and the ambient temperature. ExtendedCool Cooling Packs last 2-3 hours. SlimCool Cooling Packs last 1-2 hours. To learn more about the cooling packs check out our tech page.
2. Many Cooling Vests seem too heavy for sports, how is UnderCool different?
The UnderCool is significantly lighter than most cooling vests weighing at most 2 lbs. As we all have experienced where the weight is carried also has a dramatic impact on how it affects us. Because the UnderCool uses 4 way stretch fabrics and the cooling packs are situated against your lower back you will not feel the weight at all.
3. How do I find my correct size?
Currently UnderCool comes in 7 sizes XXS - XXL to fit a wide variety of body shapes and sizes, because "one size fits all" really isn't true. UnderCool should fit your body like a glove to give you the best cooling support.
Sizing is dependent on your natural waist measurement, not your bust, shirt or pant size. You will most likely wear a vest smaller than what you think. Not sure where your natural waist is or how to get the correct sizing? Check our sizing guide to get the correct UnderCool for you.
4. How do I recharge the Cooling Packs?
Our Cooling packs are the easiest and fastest to recharge for their next use. The packs can refreeze in ice water in 20 min, in the freezer in 40 min, and in the fridge in 60 min. Nothing else from you is required. To learn more about the cooling packs check out our tech page.
5. What if the UnderCool doesn't work for me? Can I return or exchange it?
Yes. We have a 60 day return/exchange policy.
four things to decide before you buy
Bundle your order and save.
Upgrade from an UnderCool to a Festival or Adventure to save on extra sets of Cooling Packs or an extra Vest Garment.
White or black, pick your color
If you wear more dark clothing order black. If you wear more light clothing order white. If you still can't decide, buy an Adventure and get both colors!
Correct fit = best cooling
A snug fit ensures optimal cooling. With 7 sizes XXS - XXL, you will find your perfect size.
Cooling time vs. weight
ThermApparel offers 2 cooling pack options.
ExtendedCool lasts 2-3 hours and weighs 1.9 lbs.
SlimCool lasts 1-2 hours and weighs 1.3 lbs.
