Sorry if this is a pretty basic question. I have heard that a go bag is supposed to be 10% of your weight. Is that the same as a 3 day BOB? I only weigh 140lb so 10% of my weight would be only 14lb. That seems a little light, personally and it doesn't leave a lot of room for gear. I am pretty sure my backpack for college weighs more than that. Can someone correct me if I am wrong?