Therm-a-Rest Ventra Down Comforter
I've used this with my NeoAir down to 35 degrees in my tent and stayed warm all night. I like it because it lets me stretch out. I put two NeoAirs together with fitted sheets and snap on the comforter over both for home away from home comfort. Packs down very small. It comes with a really nice storage bag and a stuff sack. Sweet. I mostly use a Therm-a-Rest simply dry sack for transport in the backcountry just in case.