I got this for cross country skiing and running in the winter and for colder spring and fall days. I get cold easily and usually have to wear a lot of layers to stay warm, this is the first long sleeve I've used where I was warm without any extra layers. I've been using it for everything from hiking to ski racing and it's been breathable and comfortable for everything. It's held up to a lot of use and washing. Would definitely recommend!
FABRIC COMPOSITION78% super-fine merino wool21% Sensil® Polyamide 6.61% creora® elastane