The Mountainsmith Approach 45 Daypack is a versatile panel loader for minimalist weekends in the backcountry, for gear-intensive day hikes or for extended adventure travel.Dual panel loader system, great for trail or travel. Smartphone compatible waistbelt pocket (fits up to iPhone 6 and Galaxy S5). Forward pull waistbelt adjustment webbing. FAA carry-on size. Anvil Airway ridged EVA backpanel padding. Front panel stretch mesh pocket with daisy chain attachment loops. Tuck-away waistbelt. Dual side panel zippered pockets. Single tool/trekking pole carry. Side panel mesh pockets. Single hydration tube door pass thru. PE framesheet with single AL stay. Dual density EVA/PU shoulder straps and waistbelt padding. Waistbelt fits 28-48 in. Capacity: Up to 50 lbs.