Why do firefighters use a two piece suit? I have seen firefighters get burns on there back due to the jacket cominng up while working at a fire. I think a one piece suit would be much safer and more quick to put on.

This is just a guess, because I really don't know the answer. Maybe it has something to do with them being able to move around more efficiently and more quickly, if the suit is a two piece one? Also, maybe they are less likely to get overheated in a two piece suit?