I believe this is 150g Merino.
The microweight was my first Merino shirt. I haven't looked back since then. I am slowly building up my Merino arsenal.
I love how the Merino wicks and dries extremely quickly. Ideal for any outdoor activity, but a must for backpackers.
Smartwool tends to run a bit more relaxed as far as fitment than Icebreaker and a few other companies.
I would buy this shirt over and over!
6' 135lbs, Medium is a bit baggy.
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