Quote:
Originally Posted by
Mr. Potato 
I've had my single vented suit altered into side vents. But to be fair, the suit was a full cut on a skinny guy, so there was a lot of material to work with. A friend of mine also had it done on his good fitting suit to less than stellar results. The suit became largely unporpotioned. The vent flap tend to overlap the suit, since only little material under it. I don't even know why the tailor agreed to it.
I actually had this happen recently as well. I didn't even request it, which is the bizarre thing. I was just having a jacket taken in and when I came back, the jacket had double vents. I was actually blown away because the tailor didn't ask me about it (could have been a huge no-no, but I actually prefer double vents). However, like Mr. Potato, I am very thin and there was plenty of fabric that could come out of the back. I am truly astonished that it looks good, but it does. I would not recommend it unless you are willing to have the jacket potentially ruined. It seems like a last ditch effort.
