Magic 4-way functionality: Can be used in 4 different ways backpack, handbag, briefcase, or carry-on. The design can be used in different ways depending on the occasion, and looks good on anyone, anywhere, at any time. ^^ The bag can hold a laptop computer, documents, and PET bottles, and can also be expanded for overnight business trips. ^^ The bag can be used as a carry-on bag. ^^ The webbing automatically retracts when the bag is lowered. The length of the webbing can be adjusted with a single push of a button. ^^ [Meticulous design with attention to detail] A smartphone pocket for inserting and removing your phone and passes, and all zippers are of high quality and stored along the main body. The backpack shoulder pad and shoulder bag shoulder pad are molded and magnetized to fit perfectly. Mesh shoulder pad that does not get stuffy. The back of the bag is made of a flexible urethane material for excellent ventilation. ^^ The patented SchuBelt was invented by Kota Ogawa, the inventor of the flick input method.