My two, aged 13 and 8, have Equafleeces but they don't wear them when we're walking because they're active and stay warm naturally, even the clipped 13 year old.
But they wear them as drying coats after wet walks, and on really cold days they wear them in the car on the way home after a walk so that they don't get chilled while they're cooling down. If we were out for the day in the cold and planned to stop for a break I'd put the Equafleeces on them during the break, but not while we were walking.