However, they stopped working about 2 1/2 months after we received them (sound only coming out of one ear; microphone no longer working). I like how they give you different sound options. 2 SIZES UP! Ive been going along that same trail almost every day for over a month, never seen a bear. Don?t like it , to big size (xl) Something thats cool about them is that docking them in their case automatically turns them off and taking them out automatically turns them on, so you do not need to remember to turn them off and on every time you use them. What about sound quality and noise-isolation? Well:The audio is balanced and crystal clear. I was surprised that ( actually) had them in my size & I actually received the correct size. Super cute shoes. I wear a 9 but went with the 8 and they are perfect!