On the side where the charging connector is, the ear cushion is spinning to hide the socket. It looks like protection from dirt, but maybe from moisture. I did not check how they behave in the rain. I liked the headphones themselves, the microphone for 4. Different pros: Good sound, great fit. For running, aerobics, to the gym - that's it. With its cons. It might seem like it's too tight. After 20 days it got better. Either the ears are used to it, or the head is stretched :D
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