Never said comfy but I’m alive with all my digits. Add some snivel and 40-60 is doable but not great. The Bivy is key with the wind here and if you add a woobie to it you can sleep pretty comfy in the 40-60 range. I like the junglebag as it works for 3/4 seasons where I’m usually at and has the built in bug net around the face to keep all the critters out. Wake up cuddling with Jake and you will be happy for the full enclosure. If I know I’m gonna be freezing I’ve got a -10 snugpak bag or the issue MSS.