Iron Man Subtle Core T Shirt
Plug into Iron Man's power core with this cool Iron Man arc reactor T-shirt from Stylin' Online. This black T-shirt features the superhero's power core, but in gray, rather than the normal yellow. This T-shirt is classic Tony Stark as far as its cool factor, but by using black and gray, the shirt does away with the flamboyance of Iron Man's red and gold attire for a more subtle show of fandom.
In Tony Stark's world, the power core is vital because it keeps him alive in addition to providing energy to the various systems on his armor. The stronger power cores on Iron Man's armor are responsible for stronger unibeam blasts, while some of the smaller power cores aid in charging the unibeam and the conversion of damage into additional energy, power that is fed back into the armor's system. Basically, if you do not have the arc reactor, you do not have the power. If you don't have power, you aren't Iron Man.