LEGE Multi-fonction Demountable Student Hand Trolley/Wheeled Backpack w/Comfort Shoulders 14" Laptop A4 Files Lightweight,Green This Trolley bag is very suitable for student The particularly selected is healthy, environment-friendly,High Quality Nylon-made; composite waterproof fabric, more improved in water-proof, wear-resistance, and aging-resistance than ordinary canvas bag on the market Durable and noiseless wheels for stable and controlled motion If your kids need to carry a lot of books,Use our product to ease the pressure on the shoulder,such as 14inch laptop,cloths,A4 Books According to scientific report,it mentions that it is in favour of cervical vertebra development while the weight of bag is less than 15% of your child's weight.The maximum weight capacity of trolly bag is 22(pounds)