I want to add a little more "smartphone + α". But I don't like the bag swelling. A flat bag that can quickly fit B6 size that solves both of these problems. Dividers of different sizes fit various sizes of belongings. Organize and store without clutter. iPad mini, novels, schedule books, goshuin books, and passports can also be quickly issued. You can also remove the strap and use it as a clutch bag. For travel, business, outdoor activities, and everyday outings. ・Strap (minimum 83cm ~ maximum 150cm from metal fittings to metal fittings) The mainstream strap width of a typical small bag is 2~2.5cm. A The Mastery Trip series uses a wide shoulder (3.2cm wide). It reduces the burden on your shoulders and allows you to carry it comfortably for long periods of time. Non-slip even over suits and jackets It is a pair specification that can be used regardless of gender with two colors of metal fittings (black and gold). *If you prefer a thin strap width, you can also use it by joining a A Mastery sash cord.