1.SPACIOUS SPACE: All the supplies you need for daily use can be packed in this backpack with wheels. The padded laptop compartment can accommodate a 26x37cm laptop. The organizer with multiple pockets allows you to organize the interior space scientifically, while the two hidden mesh pockets on the side for umbrellas or water bottles add convenience. 2.DOUBLE-TROLLEY DESIGN: This rolling backpack adopts a double-trolley telescopic rod design, which is stronger and more sturdy than ordinary single poles. The telescopic rod has two heights that can be adjusted and can be extended up to 36.6 inches. 3.7-Inch LARGE WHEEL: With large wheels with a diameter of 7inch, it provides a smooth rolling experience for various road conditions and easily corresponds to stairs. The dust-proof storage bag at the bottom of the back can cover the wheels to prevent clothes from getting dirty. 4.REFLECTIVE DESIGN: The front and shoulder straps are designed with reflective strips greatly improving the of night travel. 5.SUITCASE & BACKPACK 2 IN 1: With a telescopic handle, sturdy large wheels, and removable shoulder straps, you can easily switch between a computer backpack and a wheeled backpack. In rolling mode, tuck away the shoulder straps into the pockets, and no more dragging when rolling the backpack. When switching to backpack mode, your hands, and the breathable mesh shoulder straps are equipped with ample sponge padding to make you feel comfortable.