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Heating technology

Where the cold begins

In cold weather, the body protects its core and sacrifices the extremities. Our carbon filaments bring warmth back to the fingers, feet and lower back, where it leaves first.

  • 35 to 55 °CThree heat levels
  • 7 hBattery life on low
  • 3 to 5Heated zones on our jackets
  • €0.01Average cost of a recharge

THE COLD DOESN'T TAKE OVER THE BODY ALL AT ONCE. 

IT STARTS WITH THE FINGERS, THE TOES, THE LOWER BACK. 

THAT'S WHERE WE PUT THE WARMTH.

01

How does it work?

When it's cold, the body constricts the blood vessels in the skin and extremities to protect its core temperature. This is vasoconstriction. The fingers are the first to cool down.

Our clothing integrates carbon fibre filaments, mounted in flexible pads between two layers of fabric. Current from the battery flows through them and they heat up through the Joule effect. The filament is flat: heat spreads over the whole area, with no burning line.

  • Joule effect: current becomes heat

  • Even warmth, no hot spots

  • Zones placed where the cold strikes first

02

HEAT LEVELS

1. Press once to switch on
2. press again to change level. 

Full warmth is reached in about 10 minutes: switch on before heading out.

03

Measured outdoors

Same glove on both hands. Only one hand heated. One hour stationary, then a thermal camera image.

Fingertips, at rest (WITHOUT / WITH)+8 °C
17°C
28°C
  • -5°COutside temp.
  • 1Htest duration
  • 1800 MAltitude
06

FIELD TEST

Climbing Mont Blanc with a high-mountain guide

04

Who is it for and when?

The body doesn't tell the difference between a trail run and a hike. It does tell the difference between -5 °C in the dry and 3 °C in the rain.

  • 01

    Damp cold

    0 TO 8 °C
    -
    Rain or fog. Moisture speeds up heat loss, especially when you stop, as sweat cools on the skin. Autumn trail running, cycling, hiking.

  • 02

    Dry cold

    0 TO -10 °C
    -
    Fingers and toes cool down first, then concentration. Skiing, ski touring, dawn outings.

  • 03

    EXTREME COLD

    BELOW -10 °C
    -
    The body keeps its heat for the core and leaves the extremities aside. Gloves, socks and jacket together.

  • 04

    Cold-sensitive hands

    ALL LEVELS
    G-HEAT was born from a co-founder's Raynaud's syndrome. Gloves and socks to keep your dexterity right to the end of your outing, whatever the conditions.

05

How to use it?

Three steps. Switch on before heading out.

  • 1Plug in

  • 2Switch on

  • 3Adjust

  • 01 Plug in — Connect the charged battery to the garment.
  • 02 Switch on — Press the button once. Full warmth is reached in about 10 minutes.
  • 03 Adjust — Press once to change level. The indicator light shows the intensity. During intense exertion, turn it down or off.
06

FAQ

The questions our customer service team gets asked most often.

What temperature does each level reach?

35 °C on low, 45 °C on medium, 55 °C on high. Low is often enough when you're moving; high is for when you're stationary.

Why carbon fibre?

It's flexible and spreads the heat. A thin metal wire heats along a narrow line and is felt more.

How long does it take to charge?

4 to 5 h for the jacket battery. 6 to 7 h for the other batteries.

Can the garment be washed?

Yes, machine wash at 30 °C with the battery removed. No tumble dryer, no wringing.

Put it into practice

Heated jackets, gloves, socks and base layers.