Come and see our amazing products. Large-Capacity Mountaineering Portable Backpack use nylon fabric. It can be hand-carried or backpacked. Its capacity is very large, with a capacity of more than 2,000 ounces. It can store a 17-inch laptop and about 20-30 T-shirts. It is very suitable for traveling and climbing. The size is 6.3x4.3x11.8 inches. In addition, if you need a customized logo, please contact us. Pls confirm with us about the packing info, stock color and exact production time before placing your order.