Industry, Military

Military Cooling Vest

Heat injury is a leading non-combat casualty driver in summer training. Clema is a sub-3-lb solid-state active cooling vest. 8–12 hr with one battery swap, under 3 lbs, no water, no ice, no logistics tail. An alternative to liquid cooling garments and ice-based microclimate systems.

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Cooling vest for military field operations

Clema is a sub-3-lb solid-state cooling vest for soldiers. No water, no ice, no pump. A full shift on one battery swap. A microclimate alternative to the liquid cooling garment.

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The problem

Heat is a force-readiness problem.

#1

Non-combat casualty driver in summer

Heat injury accounts for a leading share of non-combat casualties during summer training and operations.

Load

LBE compounds heat exposure

Load-bearing equipment, plate carriers, and field uniforms restrict heat dissipation and accelerate core temperature buildup.

Logistics

Ice and water are a tail

Ice-based cooling requires freezers, refill points, and dedicated transport. Solid-state cooling removes that logistics tail.

Tempo

Operations don't pause for heat

Training calendars and mission timelines don't slip for weather. Cooling has to support sustained tempo.

How Clema helps

Cooling that runs the operation.

Solid-state, battery-powered cooling under load-bearing equipment. Sub-3-lb form factor. No water, no ice, no refill points. Hot-swap batteries cover long-duration missions and extended training windows.

  • 8–12 hrRuntime with one battery swap. Hot-swap in under a minute.
  • <3 lbsWorn weight. No bulk under LBE.
  • 120°F+Tested in extreme heat conditions.
  • No waterNo ice, no refill stations, no logistics tail.
  • Solid-stateNo moving parts, no humidity dependency.

The readiness case

Lower heat-injury rate. Higher operational tempo.

Active cooling reduces core temperature buildup during sustained activity, supporting longer effective training windows, lower injury rates, and reduced medical evacuation events.

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8–12 hr Cooling runtime, one battery swap Hot-swap in under a minute
>25°F Felt temperature drop on the body Tested in 120°F+ conditions
<3 lbs Worn weight under load-bearing equipment No water, no ice, no refill tail

FAQ

Military cooling: program-office FAQ.

What is the best military heat stress cooling gear?
The best military heat stress cooling gear is a battery-powered solid-state system that runs the full operation, weighs under 3 lbs, and does not limit mobility. Clema delivers a >25°F felt temperature drop for 8–12 hours with one battery swap and requires no ice or water.
Can soldiers wear active cooling gear on long-duration missions?
Clema is designed as a sub-3-lb suspender system with no bulk at the shoulders. Configurations for load-bearing equipment, plate carriers, and body armor are part of ongoing development.
How does Clema reduce heat injuries in summer training?
Heat injury is a leading non-combat casualty driver in summer training. Active cooling reduces core temperature buildup during sustained activity, supporting longer effective training windows and lower injury risk.
Does military cooling gear require water or refilling?
Clema does not. It is a solid-state system powered by hot-swappable batteries, no ice, no water, no logistics tail of refill stations or freezer support.
How long does the Clema battery last on a field operation?
4–6 hours on a single battery; 8–12 hours with one battery swap. Hot-swap takes under a minute, so a single operator can be covered through a long-duration mission with one or two spare batteries.
Is Clema available for DoD and military procurement?
Clema is initially prioritizing industrial deployment for the Summer 2026 release. Defense applications share the same core technology and are part of the longer-term roadmap. Contact the team to discuss program fit.
How is a solid-state cooling vest different from a liquid cooling garment (LCG)?
Liquid cooling garments circulate chilled water from a reservoir through tubing around the body. They cool effectively but require a water reservoir, pump, and ice or chiller for the reservoir. A solid-state cooling vest like Clema uses thermoelectric modules powered by battery, no water, no ice, no reservoir, no logistics tail.
What is a microclimate cooling system?
A microclimate cooling system is any wearable device that creates a cooler microenvironment between the body and outer protective gear. Categories include phase change (PCM), evaporative, liquid cooling garments, fan-driven, and solid-state thermoelectric. Clema is in the solid-state thermoelectric category.
What heat injury rates are seen in summer military training?
Department of Defense data has historically documented thousands of heat-related illnesses annually across the services, with several hundred classified as heat stroke. Heat injury is one of the leading non-combat casualty drivers during summer field training. Active cooling can reduce core temperature buildup and extend safe training windows.
Can Clema be configured for plate carriers?
The base Clema suspender form factor is designed for industrial PPE. Plate-carrier and body-armor integration is a known area of interest and part of the longer-term roadmap. Contact the team for program-fit discussions.

Related guides

Keep reading.

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What replaces a liquid cooling garment?

How Long Does a Cooling Vest Last?

Why do most quit before lunch?

OSHA Heat Standard 2026

What does the civilian framework require?

Frequently asked

Questions buyers ask before choosing a cooling vest.

Click any question to expand.

What is the best military heat stress cooling gear?
The best military heat stress cooling gear is a battery-powered solid-state system that runs the full operation, weighs under 3 lbs, and does not limit mobility. Clema delivers a >25°F felt temperature drop for 8–12 hours with one battery swap and requires no ice or water.
Can soldiers wear active cooling gear on long-duration missions?
Clema is designed as a sub-3-lb suspender system with no bulk at the shoulders. Configurations for load-bearing equipment, plate carriers, and body armor are part of ongoing development.
How does Clema reduce heat injuries in summer training?
Heat injury is a leading non-combat casualty driver in summer training. Active cooling reduces core temperature buildup during sustained activity, supporting longer effective training windows and lower injury risk.
Does military cooling gear require water or refilling?
Clema does not. It is a solid-state system powered by hot-swappable batteries, no ice, no water, no logistics tail of refill stations or freezer support.
How long does the Clema battery last on a field operation?
4–6 hours on a single battery; 8–12 hours with one battery swap. Hot-swap takes under a minute, so a single operator can be covered through a long-duration mission with one or two spare batteries.
Is Clema available for DoD and military procurement?
Clema is initially prioritizing industrial deployment for the Summer 2026 release. Defense applications share the same core technology and are part of the longer-term roadmap. Contact the team to discuss program fit.
How is a solid-state cooling vest different from a liquid cooling garment (LCG)?
Liquid cooling garments circulate chilled water from a reservoir through tubing around the body. They cool effectively but require a water reservoir, pump, and ice or chiller for the reservoir. A solid-state cooling vest like Clema uses thermoelectric modules powered by battery, no water, no ice, no reservoir, no logistics tail.
What is a microclimate cooling system?
A microclimate cooling system is any wearable device that creates a cooler microenvironment between the body and outer protective gear. Categories include phase change (PCM), evaporative, liquid cooling garments, fan-driven, and solid-state thermoelectric. Clema is in the solid-state thermoelectric category.
What heat injury rates are seen in summer military training?
Department of Defense data has historically documented thousands of heat-related illnesses annually across the services, with several hundred classified as heat stroke. Heat injury is one of the leading non-combat casualty drivers during summer field training. Active cooling can reduce core temperature buildup and extend safe training windows.
Can Clema be configured for plate carriers?
The base Clema suspender form factor is designed for industrial PPE. Plate-carrier and body-armor integration is a known area of interest and part of the longer-term roadmap. Contact the team for program-fit discussions.

Summer 2026, 500-unit first batch

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