Iron Man Armor: Mark V

The 5th version of the Iron Man suit first appears in Iron Man 2. The most notable thing about this suit is that is it's the only one that can change to the appearance of a briefcase when deactivated. Tony Stark can open it and then place it on his chest as it builds around his body.

Iron Man 2
At the Circuit de Monaco race track Tony had to use the Mark V armor to defend himself against Whiplash.