I purchased this at a store a year ago and used it for a few months, but I'm selling it because I switched to a different backpack. This is a compact business backpack with a slim body and concentrated storage capacity. The polyester fabric of the main body is PVC-coated to enhance water resistance and durability, and further silicon coating adds smoothness and luster. The back compartment has a separate PC storage space that can accommodate a 15-inch class PC. The inside uses a pile fabric that prevents scratches on the PC surface. The interior of the main compartment is equipped with a "2-WAY Through Pocket" that allows items to be taken in and out from both the side zipper of the main body and the main compartment. The inside uses moisture-absorbing and quick-drying mesh, which is convenient for storing folding umbrellas and PET bottles. A utility pocket is placed in the top front part, which tends to be a dead space in a regular backpack, for storing small items. The zipper pocket located on the lower right corner of the front is a "Quick Round Pocket" that makes it easy to take out small items even when you turn the backpack to the front of your body on a train. The back is made of mesh material cushion pads for excellent breathability and wearing comfort.