I have used merino wool shirts for almost a year now, and I highly recommend them. They are great to use for travel for the following reasons:
Temperature regulation, quick drying, and durability
They help to keep you cool when it is warm, and help to keep you warm when it is cold.
They also dry relatively quickly.
I have shirts from Smartwool, Ibex, and Icebreaker. All of them are as good as new after a year of use.
In my opinion, the only real downside to merino wool shirts is the price. Most merino shirts will typically cost between $40-$100.
In my opinion, although merino shirts are expensive, they are worth it. I have been happy with the merino shirts I have used.
My name is Billy. I am a personal trainer and teacher. I love traveling, and wanted to share some of my experiences. I hope to inspire you to see, taste, and experience more of the world. Feel free to take some of my recommendations for your own travels. I also blog about health and fitness at CustomizeMyWorkout.com/blog