I wouldn't say really warm, as they aren't windproof in the slightest. I don't think i'd want to wear it as a base layer, more of a mid-layer. If you want warmer merino base layer, have a look at Icebreaker / Mons royale / Ortovox. Designed for skiing, pricey though.
I wouldn't say really warm, as they aren't windproof in the slightest. I don't think i'd want to wear it as a base layer, more of a mid-layer. If you want warmer merino base layer, have a look at Icebreaker / Mons royale / Ortovox. Designed for skiing, pricey though.