Genuine current issue British Army fleece jacket or Liner, Green Thermal to give it it's official MOD designation. Nice lightweight but good quality fleece with elasticated drawstring at waist and strong plastic zip at front. Zip closed slant pockets on front, short fleece collar with chin wind-flap. Elasticated cuffs with thumb-hole so you can pull the sleeves down over your wrists.
Also we've got some of the older ones with a round knitted collar and cuffs incorporating thumb-holes. Darker green on zips, collar and cuffs.