As shown in the second photo, there is one instance of fraying. There may be other oversights, so please refrain from purchasing if you are concerned about minor imperfections... The zipper on the back provides excellent ventilation! It's a women's size S, so it should also fit elementary school children. ◆ Recycled cardboard boxes and envelopes will be used for packaging. ◆ Shipping will be done on weekdays when the post office is open.