I bought three of these for my kids for school thinking that they looked comfortable and practical. Before even using it one time, my daughter's broke upon putting them on for the first time. My son's broke after one day in class. Neither were using these inappropriately nor did they demonstrate negligence. I bought these in mid-July for school that began Aug 21. The first time they were needed in school was Sept 5. Much to my dismay, the tiny window for returns closes after 30 days. Disappointed.