As in Season 8, 14 out of the 22 drivers will compete with Bell helmets: among them, there are reigning world champion Stoffel Vandoorne and his team-mate Jean-Eric Vergne, the only two-time champion in the series. All the Bell equipped drivers wear the HP77, the most advanced helmet model that sets new standards for lightweight and aerodynamics. The HP77 has been also the choice of Sam Bird, Sébastien Buemi, Lucas Di Grassi, Robin Frijns, Maximilian Günther, André Lotterer, Nico Muller, Norman Nato, Oliver Rowland, Sérgio Sette Câmara, Dan Ticktum and Pascal Wehrlein.