I am selling this item because I just bought it the other day, but no longer have a use for it. It has plenty of pockets and I think it's easy to use. I think it would be good for school trips. Material ＜Outer Fabric＞ Polyester Size ＜Body＞ Width: Approximately 400 x Height: Approximately 310/410 x Depth: Approximately 240 (mm) ＜Handle＞ Height: Approximately 140 (mm) ＜Shoulder Strap＞ Length: Approximately 720-1270 x Width: Approximately 38 (mm) Weight Approximately 750g Capacity: 21L, expands to 30L with the zipper on the bottom.