Outdoor Recreation Group Rocky Falls 30.5 Liter Backpack - 2L & 3L hydration reservoir compatible Organizer compartment Front and bottom lashing straps Quick access stash pocket Trekking pole holder Side bottle pocket Side compression straps Dimensions 49cm x 31.9cm x 20.6cm 19.2in x 12.5in x 8.1in 30.5 Liters