I have several sleeping bags. Some are synthetic and some are down. All, however, need to be stored "loose" rather than in their stuff sacks to retain their loft.

This is fine for bags left at home but what about the car trunk? I have yet to find a satisfactory bag that can be stored in a stuff sack but retains its loft.

My current trunk bag is a cheap Walmart 60 degree bag that is HUGE in the stuff sack.

Any ideas?

Thanks.
Conway Yee