I've heard several guys saying that they use their keepall 45 as a manbag. I've actually never seen the 45 in person, but it can't be that much small than the 55 which my grandma has. I'm just thinking... what in the world do you put in it to fill it up? I was actually contemplating getting something like that for school, or the carryall, but both of these are a bit big for just school things. So yea- what do you fill it with?