content: I have always preferred the vertical in-the-ear style headphones since they were first introduced in the late 80's. These headphones are very comfortable to wear for several hours at a time. You will barely feel them. That's great, but how do they sound? They have excellent frequency response at 10 - 23,000Hz, and great sensitivity at 108 dB/mW. You will get good bass out of the tiny 16mm drivers. They are also water resistant, so you can wear them while exercising or in the rain. They are designed so the moisture will run down the band and drip off the bottom. I highly recommend these portable (and foldable) headphones.