Not only is the cart light and easy to transport, it comes with a fully foldable metal frame.  You can remove the backpack and fold the frame flat, easy to store or carry, travel or other purposes' essential items.  The backpack is made of 600D waterproof Oxford fabric.  It is not easy to break and durable, can carry heavy items.  Waterproof Oxford is ideal for outdoor use, camping or short trips.  The trolley bag uses large wheels to ensure smooth and flexible movement.  Push or pull without jamming.  In order to extend the caster life, we also use custom durable materials to ensure a long service life.