Nice. Real working hard hats. I always look for wear on a hard hat. If it is to clean to new. I start to think the photo is set up. When you see a new hard hat on a job. The guy wearing it is a boss or a new hire. Then there is a chance it is a tour group of none working people. The top two hard hats are dirty from work. The bottom two from hanging there.
Colours add happiness. :-)