It is a key case that can be attached to a school bag. It is made of water-repellent nylon, so you can rest assured even on rainy days. It has a simple design and comes in three colors: black, navy blue, and brown. The black is decorated with a star pattern tape, and the navy blue and brown are decorated with one-point embroidery. The key is attached to the reel attached to the inside, and since it is a zipper specification, the key cannot be seen from the front and it is safe for crime prevention. It comes with two key hooks, so you can attach up to two keys. With the school bag on your back, you can extend the reel to open and close the key. The reel built inside extends up to about 80 cm in length. Pass the shoulder belt of the school bag through the rubber on the back, and hook the metal fitting at the top to the metal fitting of the school bag. ●Voices of customers who purchased (excerpt) I was looking for a smart key case, and I chose this one because it is a zipper type and I don't have to worry about dropping it.　The size is perfect and the design is something my child likes. ・ I own several handbags and shoe bags of this brand, and I felt that the quality was good, so I bought them when my child carried the house key. 　The embroidery is also beautiful, and I am satisfied with the simple and functional design.