This merino wool shirt is my very favorite piece of layering clothing. It has exceptional insulating and breathability qualities. Even after wearing it for 2 to 3 days on end, the shirt still performs great by keeping me feeling fresh and itch free. More so than my capilene shirts by Patagonia. The natural wool fibers are great at wicking moisture away from the skin. The zipper increases the versatility by allowing some added ventilation when lowered and a snug feeling when up completely.
I've used it for hiking, trail running, and bike commuting. It's the first piece I grab when heading out for a cool to cold day of outdoor activities.