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Quantity
1
Description
Supercharged with 37.5® Technology, the upgraded version of our best-selling Merino tee is lighter and better regulates temperature.
Reviews
4.9
20 ratings
5
4
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1
I LOVE the Session shirts, but this merino shirt might be the best I've ever owned. Just ordered another and would've ordered two if there had been the right size.
Jeremy · April 11, 2026
This is one of my favorite short sleeves ever. The best use for me is running at 55f-60f. I do not overheat at those temps and the shirt keeps me warm. I run 2-3 times before washing. I also wear it at the gym. So comforable and love the fit. I am 5’9 158 and a medium is just right.
C
Chris · October 17, 2025
Keystone runwear, great in all conditions, with impressive wear life for back-to-back runs. Bought in 3 colours!
