I wore the shirt during my hike and klettersteig up the Zugspitze, using the Hollentalklamm route. The weather was hot and humid during the bottom section, and became cool as we crossed the glacier. It was always sunny the entire. The shirt wicked the sweat away and kept me cool during the humidity as well as the hot sun. It was also just enough layers to keep me warm when the air temperatures dropped as long as I kept moving. I appreciated the color as it helped me stand out on the mountain.