The ALPS Outdoorz Commander is a serious pack for serious people. with over 5000 cubic inches of internal capacity, there isn’t much that you you’ll have to leave home. This pack isn’t for the light packer. Quality Nylon construction and covered zippers are standard. External frame design which we don’t see too much of nowadays but we know from past experiences, if you’ve got heavy loads to haul, external frame packs are the only way to travel.