One day, a customer contacted us, saying, "When I was going to an interview for an entrance exam, I was worried about my bag falling over when I put it at my feet, so it would be great if it could stand on its own." We searched for the right material, considered the shape, and used a taut material to make it stand on its own. Furthermore, the material used is quick-drying and durable, so it can be used for a long time.