They are so transparent that it looks as if it is not even there. Es súper líjela, rápida a la ora de cargar , agradable diseño precio justo por que pagasLlego antes de tiempos y bien empacada 625 inchesI have a medium arch and the tops of the sandals fit exactly. 5 US and I have other Crocs sized 10 which I regret getting in that size because they fitted too big (logically, my fault there since 10 are made for size 10/10. Maybe its using an old version of Bluetooth? I wasnt able to find the version it uses anywhere. There are no kinks, tears, or anything. Such a waste. Oh well, I liked the wire free concept so much I ended up replacing them with JBL 220TWS units. Pairing was fast and reliable every time I turned them on--a rare experience with inexpensive Bluetooth headphones. ? In fact, if you switch from very good audio earbuds, for example, the Sennheiser Momentum true wireless earphones, you do notice the drop in ?sound quality.