Thread: Sleeping bag thermal liner

chuck it in tumble dryer with tennis balls and clean running shoes for hour or so to beat it up and even out the down....a liner in bag makes about same difference as summer vs winter sheets on bed.... it traps air closer to body than bag alone....if you close to wagon..a single winter sheet sewn down one side and across bottom will really boost the warmth but is heavy n bulky compared to tiny wee liner.