I've been using the Winter Trekking / Ski Touring shirt for the past six months or so. Awesome bit of kit! Under a Paramo Velez smock, in some pretty cold/wet/windy conditions, I simply haven't had to think about using a mid layer, and on those brief occassions when the sun appears I haven't had to worry about overheating. The 3/4 length pants are good too, though I prefer the Trekking pants.