Overview
- Race director Rui Marques ordered the onboard cooling system fitted to every car for all sessions in Singapore, with the cooling vest left to driver choice once temperatures exceed 31°C.
- Teams whose drivers forgo the vest must still install all cooling components and add 0.5 kg of cockpit ballast to neutralize any weight advantage.
- Forecasts indicate 31–33°C and roughly 90% humidity through the night event, with drivers warning of sauna-like cockpit conditions.
- The FIA-approved kit combines an onboard cool-box and a vest that circulates chilled fluid through approximately 48–50 meters of tubing around the torso.
- Driver feedback is mixed, with George Russell noting clear benefits, Charles Leclerc undecided pending practice, and reports citing Lewis Hamilton’s reluctance and Nico Hulkenberg’s change of stance under the new rules.