First off, these are the most comfortable headphones I've ever worn. I've tried different headphones in search of the right pair (Apple, Sony, etc.) and these are by far the most comfortable. They don't hurt your ears even after listening to them for several hours during the working day, and they don't constantly jump out when they get caught on clothing. I am also very happy with the quality of their sound. I've read a few reviews that said the bass is too intense and the midrange is lacking, but I disagree. I use them with my iPhone 6 paired with the "Jazz" setting on the iPhone EQ (very similar to the "Rock" setting) and everything comes out crisp. They certainly lack bass, but it wasn't overwhelming by any means. All in all, these in-ear headphones are very stylish, very comfortable, have good dynamic range and appear to be made from a durable, somewhat water-resistant material, meaning they should be able to withstand a small amount of sweat while running. The only difficulty I could foresee is that they are made out of some sticky rubber that can snag on something, but as I mentioned, that's not a problem just yet.
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