Hi Luke and welcome <img src="/forums/images/graemlins/grin.gif" alt="" />
Seriously if that the only issue you see, then you have come to the correct place. <img src="/forums/images/graemlins/grin.gif" alt="" /> How about laying in the dirt, ground insects and crawly things, mosquitoes, getting wet in rain from water blowing under, flowing under, and condensation on silnylon. <img src="/forums/images/graemlins/shocked.gif" alt="" />

Have you used silnylon shelters before? Any kind of tarp? Why floorless? To be UL? Personally I like a floor and zipped mosquito screens. I just wonder if you have the experience to be using a tarp in any but nice weather, no offense. Maybe you can tell us a bit more about yourself and your gear/expectations.
<img src="/forums/images/graemlins/tongue.gif" alt="" />Jim <img src="/forums/images/graemlins/cool.gif" alt="" />
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These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.