Thanks! Points noted BEagle. I personally don't wear any high viz, but some of the guys also do it for safety reasons. Sometimes you can be the only person on that whole mountainside and some of the locations are pretty remote. The last thing they want is to go rolling off a crag, hit their head go unconscious, and not get found quickly after they go overdue. I would certainly advocate that if there is a group of people on the hillside then they shouldn't use them.