HBAG Discovery 80L 5400ci Internal Frame Camping Hiking Backpack 5,400 cubic inches or 80 liters; weight 4.3 lbs empty Top-loading main compartment, front-loading sleeping bag compartment, and pair of mesh pockets for water bottle Adjustable torso, shoulder straps and waist straps Padded shoulder straps, padded waist belts and padded lumbar area for maximum comfort, with airflow system to reduce heat Durable SBS zippers to ensure a smooth and safe journey