yes but some of us work for companies who will supply you with a flight suit (one!) even though you will fly in it every day you're at work when not wearing a rubber goon suit, and this has to be kept clean. The suits come in fixed sizes so if you don't exactly match the suit size, then it's uncomfortable to wear and you can end up looking a mess.
If we had made to measure flight suits, as some companies supply, then great. Helmets?
I think we recently had a memo saying we shouldn't turn up for work wearing denim jeans, but it's okay to wear a slightly ill fitting flight suit though.