Nomex + signal liner + pocket for the PSP + pocket for a AMK Pocket Medic + more usable pockets.

Add a silk scarf (white or cream, of course) that is long enough to wind aroudn your head, and a pair of gloves, and you not only look sharp, but are equipped in a socially invisable manner. Only thing missing is a blood chit.
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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.