Doleesune Backpacking Mountaineering Packs Climbing Outdoor Hiking Daypacks 42l Internal Frame Backpacks Waterproof Mountaineering Bags 1381 nylon Imported Material: Nylon Powerful AIRCOMFORT Futura Pro Ventilated Back System, breathable perspiration, relieve burdened. Powerful Bear Breathable System, the heat could quickly spread out, avoiding the embarrassment of sweat, also it's more comfortable for your back Top load main compartment with gusseted drawstring closure and adjustable top lid Capacity: 42L Size: 24.4x13.4x9.4inch