Got my CycleChat Buff earlier in the week. Gave it a go this morning, it's really foggy here in Cambridge and pretty cold. Wonderful kit, nice and thin so fits under helmet, kept my ears warm, wicked up loads of sweat, and really comfortable. Even though it's cold and foggy I really breezed in. Must have been down to the buff, or maybe succeeding in getting rid of a squeak ... No idea why I hadn't come across them before.