Some "Old world" advices :
Down:
Valandré, very very good, pricey :
http://www.valandre.com/us/frontpage.htmWarmth, less expensive, very good :
http://www.warmthunlimited.com/Synthetic:
Carinthia, military well known bags. some models with "central zip" :
http://www.carinthia-bags.com/schlafsack/expeditionen/12.htmlHelsport, good swedish brand, very compact synthetics bags :
http://www.helsport.com/helsport/product...amp;pageid=5011