I don't know, dude, there's just something about that name I don't care for. Especially when (almost all of) the models have their logo "Man Bag" on the outside. Calling it a "man bag" could sound funny:

"Dammit! The dog is chewing on my man bag!"

"Whoops, I just dropped a bowling ball on my man bag."

"Honey, can you hand me my man bag? I want to go out with the guys tonight."