July 22, 2024

Why are there five different types of cooling packs???

ThermApparel Cooling Packs each serve an individual purpose to make the best fit for your cooling needs. From SlimCool to Grab-n-Go, check out the descriptions, specs, and uses below.

Our Tech

Our cooling technology in the Cooling Packs is Phase Change Material (PCM). Why PCM? We chose this because it's the best. The PCM we use is non-toxic and biodegradable, not petroleum-based. Our Cooling Packs cool no matter the conditions you're in. It works through conduction (making contact with your skin) to cool your body.

Think about how fast you cool down after jumping into a cold swimming pool, that is conduction in action. Unlike cooling towels and evaporative vests, PCM doesn't need evaporation to cool you down. It works whether it's humid when there is no evaporation or in the desert, where evaporation occurs so fast that cooling doesn't happen. 

Because our Cooling Packs are designed to start melting and refreezing at 70F / 21C they won't sweat making you and your clothing or costume wet. 

Ice vs PCM

Our Cooling Packs are not ice packs. Putting ice directly on your skin is dangerous. Ice is too cold and will damage your skin if left on too long (think frostbite). ThermApparel Cooling Packs are not as cold as ice and are safe against the skin for long periods without batteries, pumps, wires, external coolers, and noise.

Ice and other cooling vests require a layer or two of clothing between them and your skin to help prevent frostbite. Putting freezing ice and gel (clay and water with antifreeze) packs on your skin interferes with your body's natural cooling system.

When something that cold gets introduced to your system your body automatically tries to warm it up. Now, your body is using precious energy to try to cool down some areas while other areas are being warmed.

Our Cooling Packs work with your body by cooling your blood as it passes the Cooling Pack. This cooled blood then circulates throughout your body, helping to maintain a cool core temperature.

ExtendedCool Cooling Pack
(2-3 hours of cooling)

ExtendedCool is the iceberg workhorse of all Cooling Packs because it provides the longest cooling time and comes as three connected squares that articulate and conform to your body.

ExtendedCool can also be used interchangeably in our three main products: UltraCool, RallyWrap, and UnderCool 3. 

TIP: If more than 1-2 hours is needed get an extra set of Cooling Packs so you can continuously change them out. The spent Cooling Packs will refreeze before the new set melts, with ice and water in a zip-lock bag.

ExtendedCool Specs

 Length  9 5/8"  \  25cm
 Width 3 1/2"  \  9cm 
 Thickness 3/4"  \  20mm 
Weight  6.5 oz 
Freeze Point  70˚F  \  21˚C 
Freeze Methods and Times 
 Ice Water 30 min - Fastest, cooler, bucket, sink or ZipLock Bag
 Freezer 45 min - Easiest 
 Refrigerator 60 min 
Cooling Times
UnderCool 2-3 hours cooling time
RallyWrap 3-4 hours cooling time
UltraCool 3-4 hours cooling time
Products Compatible with ExtendedCool
UnderCool 3-6 ExtendedCool Cooling Packs
RallyWrap 6-8 ExtendedCool Cooling Packs
UltraCool 8-10 ExtendedCool Cooling Packs
Headband Does Not Fit
CoolSleeve Does Not Fit
Care Instructions
Storage When not in use, store your ExtendedCool Cooling Packs in the fridge or freezer. They can stay there for years without damage and it actually extends their lifespan.
Cleaning Hand wash with mild soap and water. Do not put in the washing machine or dishwasher. They will be severely damaged and leak...trust us, we've tried it. It makes a huge mess. Just wash your Cooling Packs by hand. 

SlimCool Cooling Pack
(1-2 hours of cooling)

SlimCool is the cool secret agent of the packs (pun intended) because it's there, but you never see it. It's felt but not seen. It's the same size as the ExtendedCool Cooling Pack but only weighs 5.1 ounces.

Made for UnderCool 3 only it gives users of the UnderCool 3 the choice of cooling power or stealth cooling. 

TIP: If more than 1-2 hours is needed get an extra set of Cooling Packs so you can continuously change them out. The spent Cooling Packs will refreeze before the new set melts, with ice and water in a zip-lock bag.

SlimCool Specs

 Length  9 5/8"  \  25cm
 Width 3 1/2"  \  9cm 
 Thickness 1/2"  \  13mm 
Weight  5.1 oz 
Freeze Point  70˚F  \  21˚C 
Freeze Methods and Times 
 Ice Water 30 min - Fastest, cooler, bucket, sink or ZipLock Bag
 Freezer 45 min - Easiest 
 Refrigerator 60 min 
Cooling Times
UnderCool 1-2 hours cooling time
Products Compatible with SlimCool
UnderCool 3-6 SlimCool Cooling Packs
RallyWrap Not Recommended
UltraCool Not Recommended
Headband Does Not Fit
CoolSleeve Does Not Fit
Care Instructions
Storage When not in use, store your SlimCool Cooling Packs in the fridge or freezer. They can stay there for years without damage and it actually extends their lifespan.
Cleaning Hand wash with mild soap and water. Do not put in the washing machine or dishwasher. They will be severely damaged and leak...trust us, we've tried it. It makes a huge mess. Just wash your Cooling Packs by hand. 

FlexCool Cooling Pack - Headband
(1 hour of cooling)

ThermApparel's patented tech makes FlexCool the head of the pack. It allows it to bend and curve around your head. The curve makes for more effective conduction, which equals more cooling in a smaller pack. 

The Headband only fits FlexCool and requires 2 packs. It can be recharged in the refrigerator or ice water. Do not freeze below 32°, or it will not bend and form to your head.

TIP: If more than 1-2 hours is needed get an extra set of Cooling Packs so you can continuously change them out. The spent Cooling Packs will refreeze before the new set melts, with ice and water in a zip-lock bag.

FlexCool Headband Specs

 Length  9 1/8"  \  23.5cm
 Width 2 3/8"  \  6.5cm 
 Thickness 3/4"  \  19mm 
Weight  3.8 oz 
Freeze Point  66˚F  \  19˚C 
Freeze Methods and Times 
 Ice Water 15 min - Fastest, cooler, bucket, sink or ZipLock Bag
 Freezer Not Recommended
 Refrigerator 30 min - Easiest 
Cooling Times
Headband 1 hour cooling time
Products Compatible with FlexCool
UnderCool Does Not Fit
RallyWrap Does Not Fit
UltraCool Does Not Fit
Headband 2 FlexCool Cooling Packs
CoolSleeve Does Not Fit
Care Instructions
Storage When not in use, store your FlexCool Cooling Packs in the fridge. They can stay there for years without damage and it actually extends their lifespan.
Cleaning Hand wash with mild soap and water. Do not put in the washing machine or dishwasher. They will be severely damaged and leak...trust us, we've tried it. It makes a huge mess. Just wash your Cooling Packs by hand. 

CoolSleeve66 Cooling Pack 
(1 hour of cooling)

You can go through a gauntlet and never find cooling that hits the spot like the CoolSleeve. The CooleSleeve66 Cooling Pack is small but mighty and sits at the right spot. Not too big or bulky but substantial enough to make a difference is where CoolSleeve66 shines. 

Putting the CoolSleeve on your arms places CoolSleeve66 Cooling Pack on the inside of the forearms and gives access to the radial artery cooling your blood like a race car on the Autobon highway.

TIP: If more than 1-2 hours is needed get an extra set of Cooling Packs so you can continuously change them out. The spent Cooling Packs will refreeze before the new set melts, with ice and water in a zip-lock bag.

CoolSleeve66 Specs

 Length  9 1/8"  \  23.5cm
 Width 2 3/8"  \  6.5cm 
 Thickness 3/4"  \  19mm 
Weight  3.8 oz 
Freeze Point  66˚F  \  19˚C 
Freeze Methods and Times 
 Ice Water 15 min - Fastest, cooler, bucket, sink or ZipLock Bag
 Freezer 30 min - Easiest 
 Refrigerator Not Recommended
Cooling Times
CoolSleeve 1 hour cooling time
Products Compatible with CoolSleeve66
UnderCool Does Not Fit
RallyWrap Does Not Fit
UltraCool Does Not Fit
Headband Does Not Fit
CoolSleeve 2 CoolSleeve66 Cooling Packs
Care Instructions
Storage When not in use, store your CoolSleeve66 Cooling Packs in the fridge or freezer. They can stay there for years without damage and it actually extends their lifespan.
Cleaning Hand wash with mild soap and water. Do not put in the washing machine or dishwasher. They will be severely damaged and leak...trust us, we've tried it. It makes a huge mess. Just wash your Cooling Packs by hand. 

Grab-N-Go Cooling Pack 
(30 min. of cooling)

The Grab-N-Go packs are the paramedic to the ThermApparel catalog of products. Keep these in your freezer, ready to go whenever you get overheated.

For example, when you have been cooking all day in the kitchen and realize you've overheated, the Grab-N-Go puts cooling relief anywhere on your forehead, back of the neck, wrist, armpits, and even in the bra (if applicable).

Sold in sets of 2 use them to numb insect bites and small kitchen burns. 

TIP: Grab-N-Go's easily fit into your front and back pockets and sports bra for quick cooling relief. If needed quickly they will refreeze in ice water in 10 min. 

Grab-N-Go Specs

 Length  3 1/4"  \  8.5cm
 Width 3 1/5"  \  9cm 
 Thickness 1/2"  \  12.5mm 
Weight  3.8 oz 
Freeze Point  70˚F  \  21˚C 
Freeze Methods and Times 
 Ice Water 10 min - Fastest, cooler, bucket, sink or ZipLock Bag
 Freezer 20 min - Easiest 
 Refrigerator 30 min
Cooling Times
Grab-N-G0 30 min cooling time
Products Compatible with Grab-N-Go
UnderCool Does Not Fit
RallyWrap Does Not Fit
UltraCool Does Not Fit
Headband Does Not Fit
CoolSleeve Does Not Fit
Care Instructions
Storage When not in use, store your Grab-N-Go Cooling Packs in the fridge or freezer. They can stay there for years without damage and it actually extends their lifespan.
Cleaning Hand wash with mild soap and water. Do not put in the washing machine or dishwasher. They will be severely damaged and leak...trust us, we've tried it. It makes a huge mess. Just wash your Cooling Packs by hand.