I bought the SP80. Lastly, we havent found that these cords (or the plug) become warm or overheat while charging. Sony did a great job, no-contest. No where near as comfortable as the Arizona ones. I have had regular issues getting the headset to connect to my phone app. The sole provides good traction for walking the dogs in the rain. So whilst I dont wear them out in public, if you too have a rather cold floor in your place I highly recommend giving these a go. The colors are also very pretty and Im glad it came in different colors to go with different outfits. la lunghezza è corretta ma sono un po strette per cui vi consiglio un numero in più se le volete indossare un poco comode. They are light weight, love the holes in the material it will be nice for summer at work, my feet will not get too hot.