The silicone feels great and is fairly durable. It is important to put out plenty of anchor rope, and use a lead chain attached to the anchor to hold it on the bottom correctly. Since I keep the phone in a battery case (for backup battery), the USB connection will not work with the iPhone supplied wired earbuds. And I love that theyre so compact- I didnt even think about it when I got them, but theyll be perfect for taking with me to the gym! A bit wobbly in the receiver but okay. so I did (normally a size 5 ) ordered a 4. They slip on and off easily, without feeling like they are falling off. Son muy cómodos con materiales de primera, lo mejor de. After a full workday, the band on top made my head hurt and I had a mild headache. But theyre the best for just popping outside.