It can be used in a wide range of situations, from daily commuting to business trips! This is a business backpack with an expandable function that has a large capacity and sufficient storage capacity. Before expansion, it can store a total of about 27L of luggage, and after expansion, it can store a total of about 31L of luggage, so you can rest assured even if your luggage increases when you are out. It opens fully 180 degrees like a carry-on suitcase, so it is easy to take out luggage such as a change of clothes.