Down Sleeping Bag vs Synthetic Sleeping Bag | Mammut Nordic Down 3 Season vs Helsport Alta Pro 

Thanks for the Video! Helped me on my decision for the Mammut sleeping bag 😊

Hi, thanks for sharing. Im really interested on this topic. I would like to share my point of view about combining 2 sleeping bags. Could it be better to layer the down bag inside with the synthetic on top? I mean , it makes sense to have the down one on top to allow it to reach the biggest loft possible . But if you put the down bag inside, it could fill up the empty spaces near your body avoiding dramatic cold drafts when moving, and also we could benefit from managing better the condensation and humidity problems, because our heat will move the humidity ( Wet clothes, body vapor...) to the outer layers of the synthetic bag, when it can get condensated and/or frozen, even before reaching the exterior. Synthetic works better with humidity than down, also offering better management of humidity and condensation from our bodies, fabrics, floor, tent walls and the enviroment itself. I understand that in this option a too heavy synthetic bag on top of the down could compress too much the down affecting the loft and being contraproductive. The thing is where is the best balance? Some brands like Helsport uses this option. Give a look to the Spitsbergen sleeping bag. Aren you still using your Isbjørn Bjornøya? What are your thoughts and opinion after some years of use? How is it compared to the 2 bags system? What kind of use do you give them? Thanks in advance, im really interested on sharing thoughts !

Can use in summer weather?