NeoAir XLite (Small)

Have you looked at a Thermarest Xlite? Better warmth to weight than those options.

If you wanna make it even more lighter and packable, there’s a way to [shorten it](https://m.youtube.com/watch?v=90Fx6TLNEJQ) down to three-quarter length and use your backpack for the lower body insulation. That’s what I do. Mine weighs 270 g after the modification.

That’s old news. They’ve altered the way they make them so they are nowhere near as noisy anymore. They used to sound like crinkly paper when you turn. No longer.

Therm-a-Rest NeoAir XLite with an r-value of 4.5 weighs 370g. You don’t need a stuff sack.

They can be cut down to torso length, but from personal experience, let me warn you about that. Torso length doesn’t work great for thick pads like an XLite unless you can find some support for under the knees. Your legs will hyper-extend due to gravity, which is uncomfortable and not physiologically healthy. Adequate head elevation is difficult if not impossible with a torso cut inflatable . I cut mine to 3/4 length such that the knees and head can rest on the pad. That works much better. My cut-down Xlite weighs 9.6 oz. Torso-length CCF pads are actually more comfortable than a torso-length inflatable for the reasons given. They also solve the problem of arms falling off narrow pad and are also lighter and much more durable.

Continue using your foam pad, but add an Xlite in the smallest size that works for you on top of it.

I started out with a wide rectangular pad (Nemo Tensor Insulated at 540gr), before realizing I slept just as well on a regular mummy pad (Thermarest Neoair X-Lite at 380gr) or even a torso length pad (X-Lite at 205gr). Too often people (including myself initially) think they need a wide rectangular pad for whatever reason.

>For people that move when they sleep, I’ll take all the width I can get And yet, for what it’s worth, it’s this kind of statement that leads many to get a wide pad even if they don’t really need it 😉 I frequently switch sides and yet found I can do this just as well on a regular (short) mummy pad. If you wanna drop your pack weight, you’ve simply got to try things out.

You can try to source an old X-Lite NeoAir that originally came in a torso length version. Mine is just over 200gr. It’s less high than the NXT and I have no issues like some describe above - although I mostly sleep on my side so that helps.

I have used the Tensor Insulated RW (predecessor of the All Season) and (older generation) X-Lite mummy extensively, and I sleep equally well on both. Therefore, I prefer the X-Lite for it’s lower weight.

It’s discontinued since a year or something though. 

Had a few all of them had baffle explosions after just a few uses.  I am gentle and not a big guy. They always replaced it and I ended up selling the last new one that I received as a replacement. The fact that they discontinued it is a confirmation that it was not just an issue for a few people. 

Afaik they don't make the Xtherm in a short. It's an Xlite.

Biggest problem is your pad. An Xlite short is going to feel like a refrigerator on hard pack snow or ice and if your legs/feet are off the pad it will be even worse. Realistically you have two options. Buy a warmer sleeping bag and pad or scrub the trip. 0*f with that is ignorant. At best you wont get much sleep. At worst you'll be forced to pack up and hike to stay warm which has its own added dangers. 

Note the switchback also. Xlite + switchback on top is probably warmer than Xtherm in practice, despite the lower official R-value. The fact that it's short is a bigger problem. I usually do short foam pad over full-length Xlite for snow. Maybe full-length foam over short Xlite would be ok too. But unless OP is a very short person, I don't see how this is going to work.

I started on the old school thermarest shortie, then a full length, then switched to a big agnes inflatable--which i liked but went through two of them with bad valves. Switched to a nemo a couple of years ago, and love it. It's a little "crinkly" sounding, but otherwise well worth it. Good choice :-)