I hadnt even tried adding the additional bandwidth required by voice yet. Everything is warm and clear and even. I can fit a case of earbuds in here and a wired earbud. As some one who has waist trained over the past let me tell you guys this is the best one I have owned the other ones I would only use to sleep as they were tremendously visible through clothes. UPDATE: After contacting Crocs directly (within the 90 day quality guarantee window) they are replacing the shoes. Buena calidad vale mucho la pena comprarlo I rinse it in the tub and hang to dry. Even the original Atlanta Soft Toe I was a loose fitting shoe that didnt squeeze my feet and my so glad that KEEN truly adapted the same design to the 2nd series of these shoes. You know it’s true when you hold your red clothes up to them. Y lo más triste es que aún con el teléfono cerca, se desconecta ocasionalmente uno, y resulta un fastidio.