Quote:
Originally Posted by
Lel 
If I had to take a guess it's because he's "in motion", he's physically raising his arms while the suit is buttoned so it causes the wrinkling. As for the actual cause, if you look at the stress it's very tight around his shoulders. My guess is that the suit fits in the shoulders but (and I mean no offense) his shoulders are pretty boney/skinny so it doesn't drape perfectly.
I am no expert, but I would bet that (a) it's only half-canvassed, with canvass in the chest piece but not extending all the way under the collar area / through to the lapel OR (b) there's simply too much excess fabric there where it shouldn't be.
Almost similar to the reason the top of a shoulder will divot....because it doesn't have enough width of the fabric to properly drape over the shoulder (this being the opposite case).
However, I defer to the true sartorial experts.
