I have Western Mountaineering Versatile 10 degree bag.  I use it four seasons.  I add clothing if it gets real cold.  The difference I see in it and my former zero degree bag for warmth are minimal.
@Birdbander My bag is 2 pounds. 850 fill. A lesser fill bag is going to be close to four pounds. You can pay more money to save weight.
	
		
			
		
		
	
				
			@Birdbander My bag is 2 pounds. 850 fill. A lesser fill bag is going to be close to four pounds. You can pay more money to save weight.
					
				
 
 


