Winter Groundcloth?

[Tiefschnee]

I'm seriously considering an LBO + 3 pc vestibule for my lightweight winter tent. This is a simple question, but all of my winter camping so far has been in tents with floors. What's a good groundcloth to use on snow in a floorless shelter like the LBO? Thanks!

[kevin_t]

Several options

Painters tarp, cheap and light.
Bivy sack , modular and pretty light , good if you are a quilt sleeper often
Nest creates a double wall and floor
Tyvek - cheap light and crinkly

[Tiefschnee]

Thanks for the ideas Kevin!