They are made by Head, are lightweight and of a stretchy material that provides a surprising amount of warmth.
The fingers and palms have a layer of rubber bubbles that give a great deal of grip. This is great for cycling. There are also no bulky seams which results in a very compact glove.
The Head stitching and top of the finger, light up on the dark when light is shined upon them.
The clever bit is the finger and thumb. Both are covered in a small patch of material that mimics fingers, this allowing you to use your iPhone or any other touch screen. Very clever and very useful!
I bought them for £9.99 from Costco but I believe some running shops and cycling shops stock them. I have to say that Costco didn't have any more in stock a week after I bought them (a work colleague wanted a pair) and I have not seen them since. If however you can find a pair, they really are good for the winter commute.