They are not lined with fleece at all. definitely good for a moisture wicking base layer in contact with skin but definitely not an insulating layer. overpriced because they are not isolated, probably they will come back. My son and I walk a lot in the fresh air and he rarely catches a cold. I've just tried this as a base layer for insulation at 40° and complained that it gets cold after 5 minutes, i.e. it doesn't store any heat and is only supposed to absorb moisture.
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