Heat stops your crew.
Clema keeps them working.

Full-shift active cooling for industrial crews in 120°F+ heat. No ice. No re-freezing.

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8–12hr Full shift, one battery swap
>25°F Felt temperature drop
<3 lbs Under 3 lbs
120°F+ Built for extreme heat

What is Clema?

The active cooling vest for crews who work in real heat.

Clema's revolutionary solid-state tech cools you electrically: on demand, all shift, under PPE. No ice, no water. Fewer errors. Less downtime. Safer crews. Clema holds.

How it works Compare vest types Run the ROI calculator

The shift

Cool the worker.
Not the building.

A century of cooling was built for spaces, not people.
Until now.

01

Contact cooling where it counts.

Active cooling sits against the core, drawing heat off critical organs as it builds. Not dependent on shade, humidity, or environment.

Illustration of body heat radiating from the chest and core, where a cooling vest draws it away
02

Works with the PPE they already wear.

Under 3 lbs. Works with a fall-arrest harness. A full shift on one battery swap. Nothing extra to carry.

Worker wearing a Clema active cooling vest over a t-shirt at a warehouse loading dock

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Clema

The job doesn’t stop at 100°F.

Now your crew doesn’t either.

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Industries

Cooling vests built for the crews that work in real heat.

Construction

Pours, tie-offs, no shade.

Data centers

Cooled for the servers, not you.

Roofing

Tear-offs on a 165°F deck.

Oil & Gas

Turnarounds in FR coveralls.

Utilities

Line work. Storm restoration.

Military

Plate carriers in full sun.

Manufacturing

Furnace lines and hot work.

Warehouse

Pick faces in a non-AC high bay.

Logistics

Dock plates. 120°F+ cabs.

The stakes

Every hot day, you choose:
production or safety.

$50K–$200K+ Single heat-incident cost, before litigation
30–50% Output drop on peak-heat days
36M+ Heat-exposed US workers

Background on the hazard: OSHA heat exposure and CDC/NIOSH heat stress.

Run the ROI calculator Compare vest types →

Already know the math? Apply for early access →

The team

Built by an energy strategist and a materials engineer.

Clema was founded in 2025 to bring solid-state cooling to the people who can’t leave the heat. Anna comes from BCG’s energy and industrials practice; Clément from materials engineering at UC Berkeley and Lawrence Berkeley National Lab.

Meet the team →

In the field

Clema founders with an industrial crew at a customer site visit
On site with crews Designing with the people who actually wear the gear.

Summer 2026, 500-unit first batch

Be the crew that never stops for heat again.

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Launch list

Not buying gear this quarter?

Get pricing and the pilot results when the first batch ships.

Apply for early accessTalk to the team