US Military Surplus Foliage Patrol Sleeping Bag

Patrol sleeping bags are lighter weight, pack up smaller, and are meant for temperate weather.  Pair with a bivvy and pads for better insulation and waterproofing.  By themselves they tend to be sufficient for warmer spring/fall and summer nights.

Surplus sleeping bags all come pre-farted in.  If you want fart free sleeping bags, go buy new.