How Active Cooling Works | ClemaCore Technology

Q: How does an active cooling vest work?

An active cooling vest works more like a refrigerator than a cooler. A cooler stays cold only until its ice melts; a refrigerator makes cold continuously as long as it has power. ClemaCore is solid-state and battery-powered, so instead of slowly thawing like ice or gel packs, it generates cooling against the body continuously through the shift.

Q: What is solid-state active cooling?

Solid-state active cooling produces a cooling effect using electricity rather than melting ice, evaporating water, or circulating refrigerant. Because there is no stored cold to run out and nothing to refill, it delivers steady, repeatable cooling on demand — the way any electric appliance runs consistently whenever it is powered.

Q: How is active cooling different from ice, PCM, and evaporative vests?

Ice and PCM vests store a fixed amount of cold and fade as they warm up. Evaporative vests depend on dry air and lose effectiveness in humidity. Active cooling is powered, so it stays consistent from the first minute to the last and performs the same in dry or humid heat. Think continuous air conditioning versus a bag of ice.

Q: Does ClemaCore use ice, gel packs, or water?

No. ClemaCore uses no consumable cooling medium — nothing to freeze, soak, or refill. Cooling is generated electrically and runs on a hot-swappable battery, so a crew resets for the next shift by swapping a battery rather than restocking a freezer.

Q: Does an active cooling vest work in high humidity?

Yes. Because ClemaCore does not rely on evaporation, humidity does not reduce its performance. It delivers the same cooling in humid heat as in dry heat — a key advantage over evaporative vests, which weaken as humidity rises.

Q: Does ClemaCore fit under existing PPE?

Yes. ClemaCore is lightweight — under 2 lbs — and designed to be worn under hi-vis vests, FR coveralls, fall-arrest harnesses, SCBA, and arc-rated outerwear without modification, so cooling stays out of the way of the gear a crew already wears.

The core idea

Don't carry cold. Generate it — and never run out.

Every passive cooling vest works on borrowed time: it holds a fixed charge of cold, then fades as the shift wears on. ClemaCore doesn't store cooling — it produces it. A solid-state, battery-powered system actively pulls heat off the body and keeps doing it from the first hour to the last. Give it power, and the cooling simply doesn't quit.

How it works

Powered cooling, explained simply.

01

It makes cold — it doesn't store it

ClemaCore produces cooling electrically, on demand. Nothing is quietly thawing toward a warm vest halfway through the shift.

02

It runs as long as it has power

Cooling stays steady from the first minute to the last. When a battery runs low, a fresh one swaps in and the cooling continues — no downtime, no refreezing.

03

It ignores the weather

Because it doesn't depend on evaporation, humidity can't slow it down — the same cooling in muggy Gulf-Coast heat as in dry desert heat.

∞

Nothing to refill

No ice. No gel packs. No water. No refrigerant. Nothing to refreeze or restock mid-shift — the only reset is a battery swap.

Built for the worker, not the athlete

Lightweight, powered, and out of the way.

Most personal cooling gear was designed for short, controlled use — a marathon, a clinic visit, a sideline. Industrial crews need something different: cooling that disappears under their gear and lasts a full shift. ClemaCore is engineered around that wearer, so it's something crews actually keep on instead of leaving in a locker.

Under PPEWorn under hi-vis, FR coveralls, fall-arrest harnesses, SCBA, arc-rated gear.
No modZero modification to existing equipment. No new hazards.
<2 lbsWorn weight. Doesn't fatigue across an 8–12 hour shift.
No hosesNo external reservoirs or pumps to snag on equipment.
BatteryHot-swap in under a minute. 4–6 hours per battery, 8–12 hours with one swap.

Specs

ClemaCore at a glance.

Cooling technology	Solid-state active cooling (battery-powered)
Form factor	Lightweight wearable, worn under PPE
Runtime per battery	4–6 hr
Runtime with one battery swap	8–12 hr
Battery swap time	<1 min (hot-swap)
Felt temperature drop	>25°F
Rated environment	120°F+
Worn weight	<2 lbs
Consumables	None — no ice, gels, or water
Humidity dependency	None — works in any climate
PPE compatibility	Under hi-vis, FR, fall-arrest, SCBA, arc-rated outerwear

FAQ

ClemaCore technology: short answers.

How does an active cooling vest work?

An active cooling vest works more like a refrigerator than a cooler. A cooler stays cold only until its ice melts; a refrigerator makes cold continuously as long as it has power. ClemaCore is solid-state and battery-powered, so instead of slowly thawing like ice or gel packs, it generates cooling against the body continuously through the shift.

What is solid-state active cooling?

Solid-state active cooling produces a cooling effect using electricity rather than melting ice, evaporating water, or circulating refrigerant. Because there's no stored cold to run out and nothing to refill, it delivers steady, repeatable cooling on demand — the way any electric appliance runs consistently whenever it's powered.

How is active cooling different from ice, PCM, and evaporative vests?

Ice and PCM vests store a fixed amount of cold and fade as they warm up. Evaporative vests depend on dry air and lose effectiveness in humidity. Active cooling is powered, so it stays consistent from the first minute to the last and performs the same in dry or humid heat. Think continuous air conditioning versus a bag of ice.

Does ClemaCore use ice, gel packs, or water?

No. ClemaCore uses no consumable cooling medium — nothing to freeze, soak, or refill. Cooling is generated electrically and runs on a hot-swappable battery, so a crew resets for the next shift by swapping a battery rather than restocking a freezer.

Does an active cooling vest work in high humidity?

Yes. Because ClemaCore doesn't rely on evaporation, humidity doesn't reduce its performance. It delivers the same cooling in humid heat as in dry heat — a key advantage over evaporative vests, which weaken as humidity rises.

Does ClemaCore fit under existing PPE?

Yes. ClemaCore is lightweight — under 2 lbs — and designed to be worn under hi-vis vests, FR coveralls, fall-arrest harnesses, SCBA, and arc-rated outerwear without modification, so cooling stays out of the way of the gear a crew already wears.

Related guides

Keep reading.

Cooling Vest Types Compared

How active cooling differs from ice, PCM, evaporative.

How Long Does a Cooling Vest Last?

Runtime by technology, 60 min to 12+ hr.

Glossary

HIIPP, PCM, solid-state, microclimate — 10 essential terms.

How ClemaCore cools.