Bruce Wayne : Tear resistant?
Lucius Fox : This sucker will stop a knife.
Bruce Wayne : Bulletproof?
Lucius Fox : Anything but a straight shot.
Bruce Wayne : Why didn't they put it into production?
Lucius Fox : Bean counters didn't think a soldier's life was worth 300 grand. So, what's your interest in it, Mr. Wayne?
Bruce Wayne : I wanna borrow it. For, uh, spelunking.
Lucius Fox : Spelunking?
Bruce Wayne : Yeah, you know, cave diving.
Lucius Fox : You expecting to run into much gunfire in these caves?
Bruce Wayne : Look, I'd rather Mr. Earle didn't know about me borrowing...
Lucius Fox : Mr. Wayne, the way I see it, all this stuff is yours anyway.
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From: Batman Begins (2005)