This Windstopper jacket delivers robust protection from the wind, and more besides. It's the only one of our action shells to be given Primaloft insulation," explains product manager Alex, "so it's warm as well as blocking cold air with its shell. It's a classic piece of thermal outerwear, which you use a bit like a down jacket. It's worn by mountaineers during exertion." Who's it for? For everyone! It's a seriously versatile product that stands out among conventional action shells. A bona fide barrier against the wind. "