NOTE - the price you see on amazon is currently from a marketplace seller, not amazon themselves. Make sure you click "33 used & new", then select amazon from the "new" list, toget them for £15.40 delivered.
Nice price for these wee headphones - Sennheiser are a top brand, and I find these in-ear phones incredibly comfortable!
Details: The CX 300 black are high-quality stereo ear-canal headphones with powerful, bass-driven stereo sound for listening 'on the move'. Ear adapters in three different sizes ensure a perfect fit, high wearing comfort and an excellent attenuation of ambient noise. The CX 300 are ideal for use with MP3, CD, MD, or DVD players and many other portable devices.