Whether you're trekking in the mountains or running through your local trails, the Patagonia Men's Capilene Cool Merino Shirt helps you stay comfortable as temperatures change throughout your run. Made with soft merino wool, this short-sleeve shirt helps manage moisture and odors while naturally regulating your temperature when the competition or day begins to heat up.

The set-in sleeve design allows for a comfortable range of motion, while minimal seaming helps reduce irritation while you're moving. From the start of your run to the rest of your day, this short sleeve offers lightweight comfort on and off the trail.