Don't worry about the attire, that particular shot was just the "undressed rehearsal" to use to finalise the suit.
The tricky part here is that the suit has to be made of one fabric only (all of it) but here is the best part, it will be a new material that will completely turn the sport on its head.
I cannot show a picture of the fully clothed Roger in flight but I will soon drop a strong hint about the material used.
Oddly there was a bit of confusion about that "large hill jump" due to an error on the emphasis in that sentence, however that worked out in our favour in the end.
( no Australian till recently had ever watched that sport, looks kind of pointless, but a Gold medal is a Gold medal...)