>>883418I use
>Z-lite sol>Neoair x-therm>Rab ascent 500>Sea to summit Thermolite linerMy warmest setup, didnt want to buy an expensive winter sleeping bag so i got the thermolite liner to go with my two season. They do a proper fuck off warm one too, claims +15°C so might be worth looking into. Ive got a rab ascent bivi, but for winter camping i wouldnt use anything but a tent.
Camped once at minus 30 with this setup, just put my belay jacket over the bag around my torso