This kind of Trolly Tool Bag is made of top quality material with advanced technology. It has a wide zipper opening for easy tool access from the large compartment. This backpack is equipped with 3 external pockets and 17 internal pockets. Mesh covered contact surface areas enable efficient air circulation between the backpack and your back. Reinforced PE board keeps the cases table and vertical and provides protection against wet floor. What’s more, the Trolly Tool Bag has the prominent features of high quality, fine workmanship, large capacity, waterproof, wear resistance, fashionable style, convenient use, breathability, durability and high cost effective. The bottom is thickened, making it can bear large weight and more durable. It receives a good reputation among our clients all over the world because of high cost effective.