[Large Wheel, Climbing Hotel Stairs Very Easy, No Wear Off The Backpack] This wheel, which we have registered an American patent, is unique. Rolling Backpack Have 18CM(7inch) Wider large Wheel, steady, heavy loading, saving labour and time, easy thru airplane aisles and stair, do not worry the wheels turned sideways, also do not worry wear off the backpack [Backpack With Wheels Have Better Handle] YH & GS Carry On Backpack have ABS Material Handle, better with time, no more worry about handle won't close [Wheel Cover Compartment] Rolling backpack for adults has a wheel cover, so will not stain your clothes. Our wheeled backpack equipped with adjustable shoulder straps, ergonomic and comfortable. Thickly padded back panel adds support while using as a carry on travel backpack [Large Capacity Space] Large rolling backpack size is 21.6 x 14.1 x 10.2 inches(55*36*26cm).The Padded laptop compartment with Velcro sleeve -16 x 10.2 x 1.2 Inches holds up to 17 inch laptop, a