Internal-frame backpack with 55 L capacity (50 L + 5 L extension collar); made of durable polyester; ideal for hiking and camping , Extensive storage pockets and compartments; large sleeping-bag compartment; multi-directional compression straps , 55 L , ZH1704013 , Adjustable straps and padded shoulder straps for a comfortable fit; open-cell foam lumbar pad and molded channels for lower-back support and airflow , Water-repellent exterior coating and integrated water-resistant rainfly for light rain; waterproof cover included for heavier rain; choice of colour , Measures 35 inches long;