Bad Hair Day

Does an astronaut need a helmet if he is in the ship all the time? Probably not. However im not sure about hair just yet. Im thinking he might wear a hat, almost to avoid a dodgy hair do and any issues that could crop up in the rendering... That and i like hats. Hair is one of the many things I dont really know about, interested to see if i could get it working and looking good tho. But first i gotta decide on a style, and not picking something that would give the wrong impression of the character.