Air Support Back Panel - body mapping supports maximum ventilation. Side cargo pockets and compression straps. Removable waist strap adds stability. Secure phone pocket with zipper secures access. Trekking pole carry easily removes or replaces poles. 2.5-Liter Crux reservoir with Quicklink system. Gear capacity: 15.5-liters 940 cubic inches. Waist belt: 26" to 46" (60cm to 115cm). Torso fit range: 15" to 19" (38cm to 48cm). Dimensions: 18" x 10" x 9". BPA BPS and BPF-free construction. "Got your Bak" lifetime warranty.