When I work night shift, I don't have to wear formal office attire to work. It will be either collared T-shirt or round-necked T-shirt with jeans or slacks for me. I have one Hewlett-Packard F1 collared T-shirt and a Nikon T-shirt with a zip in the middle. What both T-shirt have in common is that both are made of polyester and this cause a problem.
Don't get me wrong, I'm not allergic to polyester in fact I'm quite comfortable wearing T-shirt made from polyester material. Comfortable just as long as I'm not sitting in a wrong full of PCs. When I'm working, I have to sit in a room with at least 50 PCs running 24/7. Just one hour sitting in the room wearing my HP or Nikon T-shirt, I will feel very uneasy. This uneasiness can't be explained, it's just that like you just have to get out from the room.