Santa Hat

You get this hat by luck, not at a bench. Its row is empty where a recipe would be: no workbench, no research cost, nothing back from the recycler. The game text offers a ho ho ho and nothing more.

So it most likely comes out of the Christmas event itself. You unwrap a small present on a December evening, and once in a while a red hat falls out. If one lands in your inventory, keep it, because the next chance may be a year away.

The rest of the outfit is easier to get. The Santa beard costs ten cloth, and the antlers go to whoever plays the reindeer. Nothing in the row hints at protection, so leave the hat by the Christmas tree and wear a helmet out on the map.