Another question about those foam helmet covers

Fact check me on this, but if you notice, the foam covers are worn mostly ( if not exclusively) by players whose position is around the line of scrimmage. DL, OL, RB,TE, etc. I’m not sure if that’s the only criteria but it’s clearly to protect the head from injuries. Interestingly, it probably also protects the QB from slamming his hand or fingers onto a helmet. That may just be an unintended consequence. I tried to find out if it’s a coaches decision or medical training staff but the answer I got was unclear. Maybe both staffs have input. Cheers.

I think it is basically a signal for others to avoid contact at all cost. Some of the covers have cameras in them as well for coaches to review footage later. There are probably other reasons as well that have to do with film review to easily isolate players with certain color patterns.