They are plenty warm enough, but generally need washing more frequently than merino ones (I can wear the same merino baselayer all week without needing to wash it, synthetic ones tend to get very smelly after one day).
@andyp started
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They are plenty warm enough, but generally need washing more frequently than merino ones (I can wear the same merino baselayer all week without needing to wash it, synthetic ones tend to get very smelly after one day).