F1 cooling vests are chilled layers worn under the race suit that pull heat from the torso when cockpit temps climb.
If you’ve seen drivers climb out of the car drenched and red-faced, you’ve seen the problem: heat. A Formula 1 cockpit can feel like a sealed box, and the driver is wrapped in fireproof layers, gloves, boots, and a helmet.
So when people ask “what are the cooling vests f1 drivers wear?”, they mean a slim garment that buys comfort and clearer thinking when a race turns into a sauna.
When it’s humid, that heat sticks, and mistakes come faster than usual.
What Are The Cooling Vests F1 Drivers Wear?
A cooling vest is a close-fitting layer that sits against the chest and back, then uses cold packs or chilled fluid to absorb body heat. It’s worn under the suit, so it has to stay flat under belts and the HANS device.
In F1, you’ll hear “cooling vest” used in two ways. The older meaning is a vest with pockets that hold ice packs or phase-change packs. Newer rules also allow a full driver cooling system that can circulate a coolant through tubing sewn into a fireproof shirt. Both aim at the same target: slow the rise in core temperature during long, hot stints.
| Cooling Option | How It Removes Heat | What It Feels Like In The Car |
|---|---|---|
| Ice-pack vest | Frozen packs melt and soak up heat from the torso | Big chill early, then fades as packs warm |
| Phase-change vest | Packs melt at a set temperature, holding a steadier cooling effect | Smoother cooling, less “shock cold” |
| Pumped cooling shirt | Coolant flows through thin tubes across chest and back | Even cooling, needs a hose and coupling |
| Cooled-air feed | Chilled air is fed into the suit to help move heat out | More subtle, can help skin feel drier |
| Pre-grid ice towel | Cold contact cools skin before the start | Quick relief, no help once you’re racing |
| Cold drink system | Cold fluid cools from the inside in small bursts | Good on straights, limited by sip timing |
| Garage fan and shade | Airflow cuts heat load before the session | Great in the garage, not on track |
| Heat-trained fitness | Conditioning can improve tolerance and recovery | No gadget feel, built over many sessions |
Why Cockpit Heat Hits Hard
Heat in F1 isn’t just “it’s warm outside.” You have a tight bodywork shell, hot components close by, and limited airflow when you’re tucked behind another car. Street circuits add long stretches of slow corners, where the car isn’t forcing much air through the cockpit area.
Then there’s the kit. Fireproof underwear and a multi-layer suit block flame, but they also trap sweat. Gloves and boots cut airflow to hands and feet, and the helmet holds warm air around the face.
That combination is why a “small” vest ends up being a big talking point after brutal hot races.
Cooling Vests F1 Drivers Wear During Heat Hazard Races
The FIA can declare a race a “Heat Hazard” when conditions are harsh enough to trigger extra measures. In those sessions, teams can fit a driver cooling system or choose other allowed options linked to the declaration. You can read the public explainer on Formula1.com here: Heat hazard rules explainer.
Passive Vests With Ice Packs
This is the classic answer to the question. A thin vest holds flat packs across the chest and back. The packs start cold, then warm as they absorb heat.
Ice packs can feel great on the grid, but they warm fast once the car is moving. The vest still helps, it just becomes “less cold” as the stint goes on.
Passive Vests With Phase-Change Packs
Phase-change packs are designed to melt at a chosen temperature. Instead of dropping from freezing cold to lukewarm quickly, they hold a more even feel while they change state.
That steadier feel can be easier to live with under belts. The trade-off is pack thickness and placement. If a pack sits right under a strap edge, it can turn into a pressure point after a dozen heavy braking zones.
Pumped Cooling Shirts
A pumped cooling shirt uses tiny tubes sewn into a fireproof base layer. A coolant runs through the tubing and carries heat away from the body. The driver connects to the car through a quick-release coupling so they can still exit fast.
The upside is more even cooling across a bigger area. The downside is packaging. The coupling, hose routing, and extra bulk all fight for space in a cockpit that already feels tight. A setup that works for one driver’s body shape may annoy another.
How A Pumped Cooling System Works In Simple Steps
Strip away the jargon and the loop is straightforward: chill a fluid, move it through the shirt, then bring it back to be chilled again.
- Cold reservoir: A thermal store holds coolant at a low temperature before the session.
- Pump: A small pump pushes the coolant through the circuit at a steady flow.
- Quick-release coupling: A connector links the driver’s shirt to the car’s plumbing and can be unplugged fast.
- Tubing pattern: Tubes spread across the torso so the cooling isn’t just one cold patch.
- Return line: Warmed coolant returns to the reservoir so the system can keep working.
Drivers notice two things right away: where the connector sits, and how the shirt feels under load. If the hose pulls when the driver turns their shoulders, it’s distracting. If the connector digs in during braking, it’s painful.
What The FIA Allows In Driver Cooling Systems
The technical rulebook defines a driver cooling system as a system whose sole purpose is to provide added cooling for the driver, and it sets minimum performance targets for systems that use continuous cooling or stored cooling energy.
It also limits what can be inside the driver’s equipment. The cooling medium may be air, water, or an aqueous solution of sodium chloride, potassium chloride, or propylene glycol. It bans dry ice in the system. For the exact wording, see the FIA 2025 technical regulations PDF in Article 14.6.
Those limits sound nerdy, but they shape what teams can build. You can’t throw in a random refrigerant or a super-cold substance and call it done. The system has to cool without creating new hazards inside the cockpit.
Why Some Drivers Still Skip The Vest
Cooling helps, but comfort is non-negotiable at 300 km/h. A vest that feels fine standing up can feel like a brick once you’re pinned by belts and bracing under braking.
There’s also the “when” question. A hot weekend can swing from blazing sun to cooler night, and a driver may worry they’ll carry extra bulk for a smaller payoff late in the race. Some drivers prefer to lean on fitness and hydration unless the conditions are truly brutal.
Heat Hazard rules even allow a driver to choose not to wear items of personal equipment that form part of the cooling system, which is why you’ll sometimes see mixed choices on the grid.
Other Ways Drivers Manage Heat
A vest is one tool in a larger heat plan. Teams try to lower the driver’s temperature before the start, then keep the plan rolling through the session with small habits that add up.
- Pre-cooling: Cold towels on the neck and wrists, plus fans in the garage.
- Cold drinks: Sips through the drink tube on straights, timed around radio calls.
- Helmet airflow: Vent and duct choices that push more fresh air to the head.
- Seat fit tweaks: Foam changes that cut pressure points that trap heat.
- Pace control: On out-laps and safety car laps, a driver can slow their breathing and reset.
No trick makes the cockpit cool. The point is to stay closer to normal so decisions stay sharp late in the race.
Hot Weekend Checklist You Can Steal
If you want a simple way to think about heat management, treat it like a checklist. What you wear affects comfort. What the team fits affects reliability and space. Both parts have to match the track and the session length.
| Hot-Race Situation | Driver Wear Plan | Team Setup Plan |
|---|---|---|
| Long humid street race | Cooling shirt from start, drink early | Thermal store chilled, hose routed clear of belts |
| Short, intense qualifying | Pre-cool hard, vest only if comfy | Fast coupling check, short-run cooling ready |
| Race starts hot, ends cooler | Pick the lightest option that works | Keep lines tucked away, avoid rubbing points |
| High traffic stint | Drink on straights, keep shoulders loose | Watch coolant temp, keep flow steady |
| Safety car laps | Hydrate and reset breathing | Keep cooling running, avoid cockpit heat soak |
| Late race push laps | Stay compact, avoid extra movement | Confirm connector sits flat under straps |
| Driver skips cooling gear | Extra pre-cool and drink plan | Fit allowed system parts, keep ballast plan ready |
What This Means Outside F1
The headline answer stays the same: these are chilled layers worn under a suit, built to pull heat away from the torso. F1 just pushes the idea to the edge because the cockpit is tight and the sessions are long.
If you want a similar setup for karting or track days, the simplest route is passive cooling: a phase-change vest under your suit, cold drinks, and a fan before you roll out. Test it at home first so you know where packs press under belts.
And if you’re still asking “what are the cooling vests f1 drivers wear?” after reading this, here’s the takeaway: it’s a cooling layer that helps drivers stay calmer and steadier when the heat is trying to steal laps.