Having worked in hospital settings for a long time, their comments are true. However, many times nurses would wear the "fun" ones under their sterile ones during surgery and then when they go to meet the families etc, take that one off, showing the fun one.
The ones I am thinking about were simple shower cap style, so really, if you can draw a large circle and insert elastic, you wouldn't have to spend the money on a pattern. Tailored hat style would need one. Unless you are super good.
Nice project to look into though!
