DescriptionHighlights: Volume 18 L I Dimensions: H 18.5” x L 7.9” x D 8.7” Adjustable: The adjustable back offers 3 sizes: 51” / 55” / 59” Multiple compartments: Zipped pockets: 1 x Inner, 1 x Outer, 1 x Phone Pocket on Belt, 2 x Mesh Pockets Lightweight: Weighs just 1.16 lbs (527 g) 10 year warranty