Im no expert but people say they can hear me a lot more clearly in meetings. If you?re like me and love to be on the water by yourself, this is a great investment. Dado que a mi ninguna empresa me regala los productos sino que me gasto mi propio dinero en comprarlos mis valoraciones son tal cual me funciona a mi, por lo que no le debo ni fidelidad ni agradecimiento a nadie. " A kind woman actually made a special trip over to me to let me know that Id made "Quite the Entrance" when I came to the pool! Still have to pull them up at the back but not a big deal, good value and good comfort. This time I purchased a 7M. Love having the extra room cause our snowboards are on the roof! ________________________EDIT: Just started wearing when the weather turned cold, so about three months now and just inside and just feet to a patch of grass to take dog out. Noise cancellation mode worked very well, comparable to Apple Disappointed with Sony