Decided to bite the bullet and fork our £25 for a pair of them, reasoning being that if they are as good as the other zero fit stuff I have it will be money well spent.

Tried them out today, like all the Zero fit stuff feels very warm as soon as you put them on.

Did the usual around 40 miles this aft with temps around 5 - 8 degrees.

I wont say my feet felt warm, they got cold, but not uncomfortably.

Unlike with the other socks I had my feet would get colder and colder, with the Zero fits they get cold but not uncomfortably so.

If you wiggle your toes around a little it definatley makes a difference - they are called "heat rub" socks for a reason.

Bottmom line is not over impressed, but content to have socks that stop my feet getting too cold.