I bought a Buff yesterday, to replace my nice Parrot fleece hat which I've lost.
Its really good - though I've only worn it as a neckwarmer.
I got the black with reflective stripe model. All I need now is the Rapha hat with white stripe I Want, and I will be Pepe le Pew.
ps. I hesitate to ask this one, and I know the answer is "go into the ruddy shop" I bought a top from Decathlon today. Long sleeved top,with a fleecy liner. Tested it on a ride today. Its long enough at the back. The only drawbacks are that it has no rear pockets like a cyclling jersey, and it is completely black. Would it be realistic to have some pockets sewn on the back, maybe with a reflective stripe?