I use this silk bag (tall) with my Clark hammock and my sleeping kit comes in well under five pounds, total. I don't have to worry about compression of the insulation with silk and it'll keep me snug down to about 35° or 40°(F) in the hammock with the WeatherShield in place. Allot of the time I'll just lay on top in the warmer climes and use a simple silk sheet over me. As another poster mentions, the bag can be kinda tight around the shoulders. I'm 6'6", 240lbs so I don't move around much when inside it. Overall it's a very comfy bag!