NEW YORK (AP) — With NFL training camps set to start at the end of the month, the league believes it is closer to one answer when it comes to player safety amid the coronavirus pandemic: face shields for the players’ helmets.

The NFL and the players’ union agreed to several protocols in a 42-page document last week, including team travel, media and treatment response.

They have also updated the facilities protocol, specifically addressing training camp, using recommendations from a joint committee of doctors, trainers and strength coaches.

However, the two sides haven’t agreed on testing and screening protocols for the coronavirus.

One idea suggested by the union’s medical director, Dr. Thom Mayer, to help control the spread of the virus was to have players wear face masks. The league’s engineers and a sports equipment company tested prototypes for the masks, but players shot it down.

The face shield was designed by Oakley, which already provides visors for the players.

The face shield has received a better response than the mask suggestion.

“The player feedback was integral in coming up with this design,” said Dr. Jeff Crandall, chairman of the NFL’s Engineering Committee. “They (Oakley) would start with this design and say: ëDo you like this one better or this one? How’s your field of view on this one?’

“At the end, they did have feedback from players. This was their choice for the players they’ve evaluated so far. I think each player is going to have an evaluation for themselves in terms of exactly how they favor one concept versus another.”

Crandall said Oakley came up with the design.

“Clear plastic with slits or holes in it that block any direct path of a droplet, but do promote air flow, communication, soundwaves,” he said.

“They had a visor that covers the eyes. What could we do to cover the mouth and nose area?” Crandall added. “So they came up with a mouth shield that tried to keep the field of view as much as possible; you don’t want to block the lower part. You want to promote breathing and not a sense of restriction. You want to maximize comfort.

“Prevention from touching the face was also a consideration, and obviously the biggest consideration was how can you mitigate the exchange of droplets,” he said.