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That first lot looks just the jobbie. I've found some in the Damart catalogue too.
Usually I sleep in the buff, but we've started caravanning recently. We go out in all weathers, not just when it's warm, and caravans don't tend to be the warmest places at night, even with another human for company. This weekend, in the middle of a wind- and snow-lashed field, I've been kipping down in some old jogging bottoms and a lightweight fleece, but some nice, snug PJs would be better.