Both female and male vocals stand out and have clarity, a natural tonality, and are never muffled. I sometimes could not get the volume high enough on it, though it was turned up all the way. I have worn Vionic mule-style slippers and have always been happy with the soles, but the upper didnt fit right. A battery is being charge always rise temperature. This attractive towel holder was easy to install and easy to use. Nice product can tell immediately that it helps! Bought this for my mom who can wear a size 7 1/2 wide or size 8. Granted, I am not a runner, but while doing yard work, fishing, cycling, hiking and kayaking, the fear of losing the other in-ear brands forced me to use wired earbuds or not listen to music at all. I decided to order another pair because they lasted so long and my old ones needed to be replaced. Comfy, warm and waterproof, but order a size up from your normal size, I did and it?s fits perfectly.