Sebastian Vettel believes that the 'halo' head protection device should be implemented into Formula 1, even if it is not aesthetically pleasing, as it could save lives.
Vettel sampled the protective device on his first lap of testing at the Circuit de Barcelona-Catalunya on Friday, after team-mate Kimi Raikkonen gave the 'halo' its debut on Thursday.
Vettel backed its introduction and reckons such a device would have saved the lives of Henry Surtees and Justin Wilson.
Surtees was killed in a Formula 2 race in 2009 after being struck by a wheel, while Justin Wilson sustained fatal injuries in an IndyCar event in 2015, when he was hit by debris.
"I think the "halo" is ok, even if I believe that this system can be improved in terms of both aesthetic and visibility and I think we will see an evolution of it very soon," he said.
"In principle, I think it doesn't look very nice but if it can help saving lives, and if thanks to it at least the two drivers who died recently could still be here with us, then I think it can be the ugliest system, but nothing could justify not having it fitted."
Vettel finished fastest on the final day of pre-season testing and is upbeat over Ferrari's progress.
"I am happy and I think that even with Kimi we have been successful so far," he said.
"We were able to do quite a lot of laps, going through our program well, so I think it was a good test. We have to see if this car can be a winner, but I think that the first impression was good and everything we have built is positive."