This worked great. The sound quality is pretty good considering these are a 3-for-1 deal, and the price is the lowest Ive ever seen. Construction: feels solid, takes all of its design cues from Bose. I was referred to Keen by a friend who has used Targhee II Mid Waterproof Hiking Boot for years. I like them but they run small I can still make out a good range of sounds even if theres not much emphasis anywhere. Update:A day later they are still out gassing, checked the label to find they are made in China. Ante todo debo decir que este es el segundo modelo es el segundo que conozco de AfterShokz. My feet are happy. Using them for phone calls is also fine.