No rust! My phone fell off of the couch while it was plugged in. Most importantly, they have excellent audio quality. I always replace my Birkenstock with another pair of Birkenstock because when a shoes as comfortable as these you dont want to replace them with anything else. Black sharpie can fix that. And overall plastic feeling of the headphones not worth five hundred. I have never, ever had this happen to my shoes in all the years of buying this brand and other quality brands. Makes you look like you have a camel toe. Pros: good for wide feet, flexible/comfortable right out of the box, inexpensive, easy to keep clean, unusual. Bien pero los tornillos inferiores que soportan la estructura no son iguales entre ellos ya alguno no encaja bien, por lo que acaba desequilibrado el zapatero.