Features of the Ultimate Direction Fast Packher 20 Roll-top closure expands or contracts to secure varying capacities Patented InfiKnit(TM) Harness is an entirely seamless back-panel and shoulder-strap system to prevent abrasion and discomfort Large front storage for water, phone, maps, glasses, or food Unique zip-down main compartment for total access to gear Sliding rail sternum straps Height adjustable T-hook for weight distribution Easy access pocket with key fob Patented lnfiKnit mesh is an entirely seamless back-panel, waistbelt, and shoulder-strap system to prevent abrasion and discomfort Daisy chains for securing extra gear Two large side pockets for larger water vessels