I?m size 5 and the sandals feel like 5. The only time it works flawlessly outside, is when I hold the phone, in my right hand, in a looking-at-it position while walking on the street. The sound quality is hollow and void of any bass or range. It is not as rough as the G203 but it still provides good grip despite basically feeling smooth. I ended up losing mine THE FIRST DAY ! and these should last a bit longer than the Classic Slide sandal which I also own. Edito no sirve el micrófono lo he probado en infinidad de dispositivos y para mis juntas y no se escucha nada bien, demasiado ruido y como te queda a la altura del cuello roza con todo y se escucha en el micrófono, de hecho aunque lo despegue de la piel y lo tenga en la mano se escucha mucho ruido, no cancela nada los sonidos no deseados, pésimo, eso sí la calidad de los audífonos es bueno pero lástima porque no me sirve para lo que necesito. So if youre doing curls, for example, you dont start to really feel it until youre maybe 1/3 the way through the range of motion and it gets progressively harder as you get towards the top of the rep. I wanted a different case I haven?t seen before and this one really caught my eye. I am going to warthog.