Formula One drivers are split on whether to embrace cooling vest technology as they prepare to battle soaring temperatures at this weekend’s Singapore Grand Prix, with four-time?champion Max Verstappen leading the skeptics.

The FIA, the sport’s governing body, has already declared a heat hazard for the weekend at the Marina Bay Street Circuit, with temperatures forecast to exceed 31 degrees Celsius.

Despite being held at night, drivers can lose 3 kilograms of body weight over the course of the race. While teams must fit driver cooling systems such as liquid-cooled vests, drivers can opt out and take a ballast penalty instead.