Ferrari's Sebastien Vettel says his teams new wing mirror offers more rear visibility and makes the Halo more attractive.
The Italian team are the first to make use of an FIA clarification that permits wing mirrors to be mounted on the Halo, and Ferrari introduced this for the first time Friday practice in Barcelona.
"We changed it because it was quite difficult for us to see cars behind," Vettel said.
"Now they are in a bit of a different position, and I can see a little bit better below the rear wing.
So that's why we changed it. I think it also looks better. The Halo is still not pretty, but it makes it look a little bit better."
The German added:
"In the last couple of years I think we came up with stuff that other people tend to copy. Most of the cars now followed our trend in terms of the sidepods and some of the bargeboard designs.
"It's a confirmation that we're heading the right way. I think we have the tools, we have the people, and ultimately, we need to do it. That's what we all want, but there's a lot of work ahead of us."