Durability is TBD at this point. I often use it in my car, and it captures bass etc pretty well for the size of the speaker. These are the nicest sounding iems I have. I normally take UK size 8 for my shoes and the Kanyons are a reasonably generous 8. Quality is very good and battery life is very good definitely recommend this product Based on the pictures, I thought it was just a slit. In summery, this is a great speaker, and a wonderful value. None of the bolts go through the mounting brackets. I gave them a 3 cause they cute but they not for fat feet people My original review was 5 stars, and positive as below.