The non-vented jacket is sophisticated and looks great from the back but allows very little movement. If you are a man who loves to place your hands in your pockets then ventless jackets are not a good choice for you. With your hands in your pockets, a ventless jacket will crease and bunch up at the back. Classification: Business, Formal.
The vents of your jacket allow you to move with greater freedom.
No vents are found in formal jackets, and in shorter casual jackets and coats.
A single vent allows greater movement and access to your trouser pockets.
The double vented jacket is ideal for the professional speaker and person wearing a battery pack for their microphone. Side vents also allow ease of access to trouser pockets without raising the side of the jacket. They also disguise weight gain more effectively than a centre back vent.