I thought all sensible folk had 2 SD hats. one for best and one for everyday. When my first one started to get to the point where it had lost its lustre I bought a new one which only ever came out on high days and holidays until the working hat got utterly disreputable. Then a new one was acquired and the the parade hat became the working hat. Since I wasn't a member of the Two Wing Master Race, and did a few tours on training units, I had to maintain a certain standard but even so, I did not get through that many, even in 25 years.