The DD Jura might be worth a glance.
I picked one up here from Diamond Dave who decided he prefers his Snugpak Chrysalis. Central zip, less bulky than the Army bags. I haven't taken it out in very cold yet, because I'm not daft enough to, but I had a night out in the hammock in fairly cold and slept well and warm. I'd certainly trust it to lower temps, but where we mainly hammock camp is the top of the South Downs, the wind can sweep up. Nothing that a bit of tarpology can't sort out, but it's a right pain if you wake up chilly and have to make changes in the night.
I picked one up here from Diamond Dave who decided he prefers his Snugpak Chrysalis. Central zip, less bulky than the Army bags. I haven't taken it out in very cold yet, because I'm not daft enough to, but I had a night out in the hammock in fairly cold and slept well and warm. I'd certainly trust it to lower temps, but where we mainly hammock camp is the top of the South Downs, the wind can sweep up. Nothing that a bit of tarpology can't sort out, but it's a right pain if you wake up chilly and have to make changes in the night.