Adopting 1000D waterproof nylon, stitched by high strength nylon thread, outside are with high load bearing Velcro, fit for laptop with size of 12 inches. Internal part is with the main pocket for store the laptop, also attached some small pouches, which designed for different functions, for the flashlight, notebook, pens and others. Outside has the MOLLE system comprised by nylon webbings. It can be either carried by hand or by shoulder with strap.