Some Aeromedical outfits (pun not intended) wear 'jump suits'. The traditional 'monkey suit' isn't a good outfit when working in a hot environment such as the Aussie outback. The official uniform for professional pilots I believe suits (again no pun intended) the role of the airline pilot 'cause of the authority that it stands for but isn't well suited for some other roles.
The blue jump suit in question with the three stripes could also be part of some radical prison reform !
Nah all jokes aside the 3 stripes usually mean Capt on A/C less than 5700 kg's, that might be a hint !
CW