These are off road helmets.
Whoops. Does turning them on their side actually hurt them?
My brother-in-law is a UPS driver. He said sometimes the truck is so full they have to walk on top of packages to get to the one coming out of the truck. Maybe that up arrow is more important when the box is in the truck so the driver can step on your box without damaging the helmet? 
PS. I guess you’ll be wearing that helmet then having a Homebrew after whatever activity. Cheers to going off road!
Not so much worried by the up arrow as much as helmets being deemed fragile.
Seems counter intuitive, but helmets are generally rated for one crash only. Maybe this is how they ensure that they’re not broken in before they get to you.
You should definitely email the seller to find out why they did this, if for no other reason than utter curiosity.
I am not concerned, I think this seller just puts fragile stickers on everything to ensure proper handling. Or to make it look French.
I just thought the idea of fragile helmets was funny.
“Proper handling?” I used to work in a shipping department and the more fragile stickers you put on a box the harder ups drivers toss them.