The problem I see with backpacks is that there is nearly no reason to NOT upgrade when you have the chance, bigger packs make you a little easier to see to other players I guess. So what I'm proposing is that larger packs, as they would make you heaver, should slow you down, make you louder and you breath heaver; while smaller packs make you lighter, and therefore faster, able to sneak better and you don't get winded as easily. (I know its the stuff in the packs that make it heavy but that would be a pain to weigh the trade off for EVERY single can of beans) Now seeing a new pack isn't a routine procedure, but a carefully weighted tradeoff between holding space and speed/sound/endurance. Do you want to chance not being able to out run zombies for few more cans of beans, or do you chance starving to death so you can get some breathing room between you and the dead before turning around and shooting? Please start you response with something along the lines of- A) I hate you and everything you stand for, if I find you in game I will murder you and eat your beans B) I hate you but your idea isn't completely shit, still gonna eat your beans over your dead body C) I hate you but the idea is good, let's just tweak some numbers and/or add/remove something, now your beans or your life D) I hate you but I like your idea so lets run with it, Heck I'll even let you keep a single can of beans TL/DR; if you're not going to read why are you on a forum?