From GameWatcher: "Power armor helmets are pretty cool in Fallout 76, yet they can't quite compete with the likes of the Mr. Fuzzy Hat in terms of style, especially when there's construction work to be done; and there's plenty of it in Appalachia.
This particular yellow hard hat has proven to be quite elusive for a number of players. Here's where you can find the Mr. Fuzzy Hat outfit in Fallout 76."