Brendan
WKR
I have one a helinox cot and I think it's a much better way to go then a thermarest cot. I think weight they are pretty close but the helinox is super easy to use. If I ever go floorless I think I will be using the cot vs my xlite.
Helinox Cot Lite | Cots | BackcountryGear.com
I used one of these in my sawtooth for 10 days in Wyoming this year. Game changer and worth the weight. It was a spike camp and not bivvy hunting though. The Helinox ground chair is awesome too...