The Seat Sack from O2 Teach provides plenty of personal storage for students’ school supplies. Attaching to the back of the chair, this organizer keeps items accessible during class time. One large pocket offers space for books, arts and crafts materials and more. Even when using desks without storage space, the Seat Sack makes sure that your students are ready for learning and your classroom stays organized. Machine washable. Choose from four sizes and three colors.