There is plastic on the little charging dots on the headphones - you must remove them, then wipe them down with the provided cloth before charging. 5 to 8 size womens shoe and this was good fit. The sandals are the style & fit I need & got. Then I tried Anker. I finally decided to stay with brainwavz perforated prostock earpads for m50x, after swapping fitting and sealing improves dramatically, original neutral sound is kept, but its a touch brighter and instrument separation is greatly improved. Or my elbow, depending upon which doctor you talk to you. With this toe sleeve and a pair of socks, the pain goes away. Voila, two left sleeves. I have Thule bike racks and had to put them as far back as possible or the sunroof wont go all the way back. The price difference just made it so much more worth it for me and so far theyve proved to work exactly the same way.