Haven’t used the ambient, it seemed a bit warmer than the Active. Interesting to get two comments on the active being hot. I run extremely warm and sweat like an absolute mother, doesn’t matter if it’s 70 degrees or zero. The kelvin active is the only mid layer I’ve ever had that can keep up with the moisture while hiking. It’s way cooler for me than any merino mid layer I’ve used. That’s the reason I like it so much, it’s comfortable in a gigantic temperature range
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