Rolling Backpack Boys COOFIT Kids Backpack School Bag Bookbag Cute Knapsack Waterproof Dustproof Bag Rolling Backpack with Wheels Rolling backpack for boys good quality of material: Polyester Boys rolling backpack size: Large capacity: Multi pockets of the rolling backpack are designed for accommodating books, clothes, bottle, A4 magazine and other personal things Rolling backpack boys Practical: Ergonomically designed back and shoulder strap of the backpack are made of ventilate material, can efficiently decrease crash impact and help to reduce load. And the straps can be adjusted for more convenient carrying Multi-purpose: The backpack and the wheeled troller can be separated to use, satisfying with your different demands Dimensions: Backpack: L*W*H: 32*18*49cm(12.60*7.09*19.29in); Drawbar: Total Height: 90cm(35.43in). Perfect backpack for school, travel and other daily use. And please refer to the physical item for its color and size Push it down by your feet to make the cart flat and stand straight,when you hear a &#034;crack&#034;sound,it&#039;s done. Then simply slide the back of the backpack over the handle and attach the straps on the bottom to the carrier.