Two out of 12 split during assembly. This headset is going to be one of the best you may ever buy. Maybe if the post inches measurement will help a little next time. The sandals were very hard considering it has memory foam insoles. The button are used regularly as we have to swap blue tooth devises between the three of us and they still feel as good as new with well over 6 months of use. So I Ideal with different kinds of terrain everyday: lava rocks, boulders ,sand, gravel, mud, salt water etc. These are exactly what I wanted,for my wireless Bluetooth beats ,thanks Very good fit they did not get sucked off my feet while walking through the sticky mud unlike some people. Great quality and lovely colour that goes with everything! Not sure what happened.