well, there's supposed to be a logic behind this ... supposed
you're outfield in tekong and you fell ill, or got injured,
whatever, and they send you to med centre, what happens then ? ...
you can't be wearing your stinky no. 4 while attn C in med centre
right ? ... enter full pack items ... PT attire, shoes, (or
slippers if you hurt your legs) ... basic toiletries etc ....
at least ... that's what i was told when i questioned the logic of
this ... 
of course if we go to war all this shit won't be inside ....