Flyshine Kids' Student Trolley Backpack Nylon School Backpack Rolling Backpack With Wheeled Trolley Hand Bag size:48 * 30 * 17 cm/19.2 * 12 * 6.8 inch Make of high quality nylon,more waterproof than canvas bag,and also light weight This bag not only a trolley bag,and also be a backpack,just to remove when your child do not want a trolley With usefull pocket,can hold all of daily supplies that your kids need,fit for 14 inch laptop With Silence Wheels and Thick Spongia Strap,more effective to reduce pressure on back