Es de una sola pieza, en caso de algún detalle actualizaré mi opinión. Maybe with time they will become a little softer and more cushioning when they are worn some more and broken in?No sure what a GOGA mat is that they market for the insole. Sound and noise cancellation are great but as an overall product, I hate them. Let me end with some totally subjective words that describe the sound of the 650: rich, natural, musical, effortless, clean. If not, it is a terrible purchase. Like, not worth it at all. Once I wear these out, so long as they last for a bit, I will try out the 6 and see if that’s better for me. Ive been looking for those with adjustable straps so I can make them tighter. To give you an idea of size folded, it’s about the size of a carry-on suitcase. I should have worn some other shoes in between.