Jurassic World White Hardhat Positively Identified
This is a 4K screencap from the trailer:
Just barely visible is a green and white sticker on the rear of the hat:
After some guessing and Google searching, I’ve determined it says “MSA.”
I think this is their “V-Gard” helmet. It also comes in Cyan:
They appear to go for $15-$20 US on eBay. Good luck!