Waist belt built into the pack is a plus. I hike about 4 miles in the morning at least 4 times a week hauling the BOB just to stay familiar with it. A little running on and off during the hike after I cinch down the shoulder straps to hug the pack to the body. Last time I weighed it it was about 50 pounds. I will be trading ammo for supplies as I acquire them but the extra weight is a plus for the work out aspect of it.