Have not used it but the material seem to be sturdy. The backpack was super cute. Someone mentioned about the white blotchy spot and did not like it. I saw that the photo had them... it looked so cute in person. The blotchy white spot made it look cool. My eldest wanted it but she is older and needed a bigger one since she is going to 5th grade soon. This is fit for an elmentary student who does not have many large textbooks or those who are not carrying heavy or many things.