An expandable Boston bag that can be used for multiple purposes from upper elementary school to the elderly I wanted to make it an item that is regardless of age or gender, so I put it together in a basic sporty design. Since it is an item for carrying a lot of luggage, it only adopts functions that are specialized in ease of storage, capacity, and portability. Please use it for school trips, club activities, school teaching materials, and work tools. Color: Black Hand handle If you hold the Boston bag with one hand, the shoulder handle will sway greatly from side to side due to the distance (height) from the bag. To solve this problem, we have equipped a one-handed handle on the top of the bag. Body Expansion Specification When you open the zipper on the left and right ends of the main unit, the width widens by about 45mm, so you can change the size according to the storage capacity. Internal compression belt There is a fixed belt using a stretch belt at the bottom of the inside of the main unit. When carrying, it prevents the luggage from being unbalanced.