Expandable Hiking Backpack Large 6000ci-8000ci Camping Backpack Scout Daypack Aluminum Frame Sport Pack Outdoor Big Travel Bag Large and durable expandable hiking backpack Material: 420D Ripstop/1680D PU Expanded Dimension: 42" x 20" x 16"&lt;br&gt; Expanded Volume: 8000 in3 Unexpanded Dimension: 31x20x16&lt;br&gt; Unexpanded Volume: 6000 in3 Waist Strap Range: 33  74&lt;br&gt; Frame: 2 Removable Aluminum Frame Bonus Removable Deluxe Waist Pack &lt;br&gt; Torso Fit Range: 16  22