KAKA Outdoor Sport Multipurpose High-Capacity Hiking Climing School Backpack Grey #88003 Main pocket is Large enough to carry what you need. High quality and durable,better ventilation not easy to deformation Easy to Adjust the length and lock firmly. High-quality zippers, but also water-resistant. Protection a good protection;it can effectively reduce the burden. <span class="a-text-bold">Material:</span>Oxford fabric <span class="a-text-bold">Size: </span>Approx. 57x31.5x18 cm/ 22.4x12.4x7 inch (LxWxH) <span class="a-text-bold">Capacity:</span> 40L <span class="a-text-bold">Max laptop size: </span>17 inch <span class="a-text-bold">Color:</span> Black , Gray and Army green <span class="a-text-bold">Style: </span>Casual, sport, travle <span class="a-text-bold">Occasions: </span>Mountaineering, Cycling, Vacation, Travel, Day hikes, School, Camping etc. Comfortable handle to carry Smooth zipper and easy to get stuff Solid copper hardware