There's lots of gear out there that keeps your backside warm. And lots of it is expensive and lots of it comes with a notable weight penalty. And lots of it isn't needed depending who you are, where you are when. See my post in this sub-forum, 'sleeping in insulated pants.'

I use a 3/8" CCF pad that weighs 7oz and, in concert with the rest of my sleep system, it's good into the mid-20s. For most areas, that's sufficient for three-season camping. Of course, my sleep system is different from most... wink But for those that want to experiment, warm hammock sleep systems do not have to weigh a bunch or cost a lot.

My backside is kept warm by seven ounces of CCF that cost about twenty-four bucks...

FB

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"...inalienable rights...include the right to a clean and healthful environment..." Montana Constitution