Actualización antes de todo: No duraron ni 15 días, :v se escuchan sólo de un lado (del derecho para ser exactos), esperaba duraran más, el audio es excelente, pero realmente esperaba duraran más de 15 días, los compre hace un poquito más de un mes, pero enferme de covid y no pude usarlos unos 20 días por lo mismo, así que de uso real sólo unos 15 días, no los recomiendo, quizá fue producto defectuoso, pero como ya paso más de un mes ya no aplica la ventana de devolución de Amazon, por sonido los It seems to does what it should do: let in ambient sound to counter noise isolation. I saw at least four moths flying around in my home over the course of that time period, only one month was found in a trap. I found the booty fit to be a bit uncomfortable for the first few days but after few days the shoe opened up bit, it was a great snug fit. The length is good, but even with the adjustable band pulled as tight as possible they are still wide. This headset is comfortable and feels well built. The down side was I got them in a size 7 womans but they were much bigger then expected and a bit wide for my slender feet. These had lots of leg room but the elastic was so tight that it tended to ride up and be uncomfortable. For me, they would end up collecting dust, so Im not sure I would spend less. But the best feature is the way it adheres to the watch.