Toro Rosso driver Sainz and Red Bull driver Ricciardo will join Mercedes' Nico Rosberg and Force India's Nico Hulkenberg in running the Halo for an installation lap.

Sainz, who had previously called for a driver vote on the device, was pleased by the decision to have several number of drivers try out the device.

He said: "It feels like they've listened to us - after Germany, we said that we should all try it, give it a try and give our opinion. And it's good that we drivers are running it tomorrow."

The Spaniard also said Spa-Francorchamps was the perfect place to trial the concept.

"I think it's the ideal track to check it out, because, at the end, it's a visibility test. And here, through Eau Rouge, is where you really need to feel whether it's compromised or not."

Additional reporting by Oleg Karpov