Great design -- long-wearing comfort, decent sound, and they simply will not fall off.This hang-on-outer-ear design is the only headphone design that can be worn for hours and hours in comfort. They don't jam into your ear canal or hang in the inner ear.These are NOT noise cancelling and this is a feature -- you can still hear a bit of what is happening around you. They are ideal for outdoor exercising like running. Sound quality is good but not great. The low-end is merely adequate. Because they allow in some ambient noise, the peak volume doesn't seem that high.Incidentally, its a mystery why this design is not more popular. Sony used to make a simpler version of these that they inexplicably stopped making about a decade ago, and Phillips has a similar design that are now also hard to come by.