【Functional Design】4 carry ways (Backpack/ Shoulder Bag/ Crossbody Bag/Handle Bag). It has an adjustable long strap suitable for every body shape. Backpack straps can be hidden when you use it as a shoulder bag. You can convert the bag freely and easily to fit your different needs. It can be your everyday rucksack, spacious laptop bag for travel College business or daily use at anywhere.