Other dudes have hit the safety aspect, but heating up or boiling hot water to put in a Nalgene at night can make a cold night significantly more palatable. It may even allow you to bring a lighter bag or ditch the puffy pants saving more weight than it cost as mentioned like @wapitispokes said...
Quick down and dirty or BLUF:
If you have the coin buy them as their value is absolutely there and peace of mind is priceless.
Lengthy and overly verbose review:
I contacted Stephen back in July 2021 to get a consult and ask a ton of questions. I had been talking with a military buddy...
Hey looking to sell some 300 brass. Prices are shipped lower 48. For the 220gr Hybrid Bergers I would gladly trade for 215 Hybrids. PM with questions.
50rds new/sealed ADG brass 85$
50rds once fired ADG 50$
220rds Hornady once fired 80$
250ct Berger 220gr LR Hybrid Target 150$
-Jordan
Yep I had been looking. Found it on GB and contacted them. Their store price is way cheaper than GB due to the fees. If you buy it then I can’t so my wife thanks you.
This is the only one I have been able to find Lately. Was going to purchase it this week but am going the barreled action route now. Hope it helps.
https://battlehawkarmory.com/product/seekins-precision-havak-element-6mm-creedmoor-21-barrel-1-5rd-magazine-mountain-shadow-rifle#product_detail
I think it just depends on your tolerance for pain. The Uberlite is just that. If you use a foam Z-lite pad for a glass pad like I do, you could put that under your torso (I recommend 6 sections, 8 if you aren’t a midget like me) to get a little more insulation. The Xlite is great by itself...