Once when DD and I went camping in the summer we didn't bother to put the tent inner (including the ground sheet) in the tent. It was so so hot, we had camp beds that would keep us off of the ground, and we imagined a lovely night of cool fresh breezes, but still ultimately warm.
How naive we were, how foolish. How COLD! By midnight we had realised what a dreadful mistake we had made, the cold from the ground had chilled everything, the air temperature had dropped rapidly once the sun had gone down and with only a single skin to the tent the warmth in that had gone too. How we shivered and griped. How we wished we had more on than a T shirt and pants!
And I might need to sleep in it, as a proper test, and when I do, I shall be snuggly too!
The Ladies Thermal underwear set is available from the eCornerShop
They don't only sell ladies under wear, they have thermals for men too
Disclaimer - I was sent the thermals in exchange for this review but the opinions in this post are all mine (as is the embarrassing naive camping experience)