Since 1994, FIA regulations have made it compulsory for everybody working round the car at a pit stop to be kitted out with Nomex overalls similar to the ones the drivers wear. Nomex fibres can withstand a temperature of 800 degrees Centigrade for at least 12 seconds. The drivers also have Nomex underclothing, socks, face masks and gloves, the latter with suede leather linings to give them the best possible grip of the wheel.