Very disappointing and frustrating as these were not inexpensive sandals. [Update] : Im still using this headset on a daily basis after nearly three years. Horrible thin sound. My dad was delighted to receive these crocs for his Xmas and has hardly had them off his feet! I wonder why they dont make it clear that you will be exercising on "FORMALDEHYDE" . UPDATE 05. Ok so I wear a 5 in shoes but Croc actually carries size 4 so I decided to go with the 4 thinking they run larger. Noise cancelation is mediocre at best. One thing I like a lot about this earbud design is that the earbuds are small and light. The cable is corded and fantastic quality - doesnt tangle, or knot at all and is built very well.