This backpack is made of durable waterproof polyester, good air permeability and heat dissipation with two padded shoulder straps, offers lightweight carrying and strength reinforcement, relieve shoulder pressure, and maintain cool when wearing for a long time. And it's hard, solid, and doesn't fade. Main pocket x 2, laptop compartment x 2 (suitable for 13 "tablet and 14" laptop respectively), The wet bag is made of high density water resistant material can help you to separate dry items and wet items, if you have wet clothes or towel, you can put it in the wet bag. A separate shoe compartment can help you carry and keep your shoes better in your travel bag. External dimensions: (W * L * H) 43cm * 30cm * 20cm 16.93 "* 11.8" * 7.9 "; Weight: 2.2Lb / 1KG.