In case you didn't know: Putin had his long-planned "Mission Accomplished" rally about Ukraine yesterday, intended to have been a major propaganda moment, only that they didn't have a victory to celebrate. It was the anniversary of the Anschluss of Crimea, so they focused on that and a "Support our troops" message instead.

My suspicion is that the style of the flight suits had been chosen for propaganda in connection with that event: supposed to have been a reference to a victory they didn't had.