In reply to UKC/UKH Gear:
So we have gone full circle!
Fleece kept you warm but let wind pass through.
Then Primaloft, etc, filled garments were as warm but better due to wind resistance, layered easy due to slick lining. Less breathable for on the move though.
Polartec Alpha, all of the above but more breathable.
Take out slick inner lining, lighter, more breathable, still windproof.
Voila, take off outer windproofing, leaving insulation, ie fleece!!
So it is a new fleece, with the inherit limitations!? Hmmmmn.....
Stuart