Ground sheet

[Ohoopee]

tyvek. I also use therma-rest seat pad for under my
feet in the winter when I am making coffee or a meal
under my tarp. I have to thank Shug video for recommending
a thicker mat for winter!!

[Five Tango]

Ditto on the sit pad.I also use it for my "kneeling knee" when doing little chores under the tarp.Since I use either a gear hammock or at least a boot hammock(both by Simply Light Designs) I don't need much under the hammock.But if I do,the rain kilt is always ready to serve.

[Garsk]

I have a 2x3 ft portion from a old yoga mat. Small, foldable, but soft and warm on your feet

[gunner76]

Nothing...less to carry

[OCDave]

What does everyone put on the Ground underneath the tarp

Welcome to the forums Mudslinger!

My original TYVEK was 5'X7' cut to serve as ground cloth beneath a backpacking tent. While larger than needed for hammocking, I did not want to cut it down to preserve its functionality for under my tent. After years of carrying a 5x7, I have come to appreciate the size and would feel less prepared with anything smaller. It is useful so many times during a day in the wilderness where a smaller piece might not be.

I now have several 5x7 sheets of Tyvek including 1 in each of my vehicles with the spare tire and road-side emergency stuff- just in case.