I have a Mountain Hardwear...I am 6'3" and range from 250-260 depending on time of year LOL. I need roomy....and my 0* bag from them is a Lamina )*. I chose synthetic fill for a couple reasons. One, it is usually very damp even in winter with sleet or wet snow in mountains...not the dry fluffy stuff of out west or extreme northeast. Secondly, the chance of it going from snow to freezing rain is highly likely and getting drenched, third...I canoe a lot and use dry bags but have set up camp and had a thunderstorm blow through and flatten tent and rip up all the stakes out of nowhere and drench my gear and then drop to freezing that night. An hour sitting around a camp fire with the bag open on my knees...moving it every 15 minutes on one side and then the other gave me a dry and warm bed for the night.....as it was the ONLY thing dried out when sun went down. If money was not an option I would look at the new down that is weather proof...but that is high dollar. I have been very happy with my Mountain Hardwear bags and tents the past 10 years.... In summer...I lie on top and use a old poncho liner as my cover. I got my stuff on sale...sale on previous year gear they do at Moosejaw.com every year. Check it out.