Description of Lowe Alpine Airzone Centro 45+10 Daypack Large enough for a simple overnight camping trip, this pack offers the committed hiker a versatile 4 season pack, fully adjustable and ultra comfortable. Features: Volume: 45 L / 3300 cu in Load Zone: 22 - 33 lbs / 10 - 15 kg Weight: 3 lbs 2 oz / 1 kg 418 g Torso: 16 - 21 inches / 41 - 54 cm Back Panel: Centro Adjustable Airzone back 16 - 21" Access: Top Storage Grouping: 1 Compartment / 5 Pockets Hydration Compatible: Yes Rain Cover: Yes Frame: Internal Compression Straps: 4