I guess since this is my first post I'll introduce myself. A lil background on myself. My name is Adam and I'm currently serving in the military. To answer the question on what does BDU stand for it's Battle Dress Uniform and is the old camo the Army used to wear the new version is named ACU for Army Combat Uniform. It's actually not the best type of camo and actually scored lower on tests of how well it conceals. A better military style camo would be the Multicam type of camo. I'm actually looking to buy a set or 2 to use wen i get back and possibly the old style of camo as well.