Neutrino 600

Nu, un Neutrino 600 si un Expedition 1000 :) I-am tot invartit..am avut si un MH Phantom Alpine, super misto, dar ff stramt ( facut sa fie eficient, dar eu nu puteam dormi in el ) Astia sunt mai lati in umeri...in Expedition 1000 intri 2 persoane daca te pui.

The Rab Neutrino range are fantastic.

The Rab Neutrino range is an awesome sleeping bag.

Strongly disagree. Fill weight does not equal fill power. As another user commented, one rates by safety and the other by comfort. You won’t die in the marmot at 0 degrees but you won’t be comfortable either. The Rab rating says you’ll be comfortable down to 5 degrees but the safety rating is likely -5/-10.

Ran is top tier. iirc all of their stuff sacks are woven onto the inside of a dry bag and that attention to detail comes with a slightly higher price.

650 vs 800 fill refers to how many cubic inches 1 Oz of insulation occupies, ie. How "fluffy" is the insulation. Fluffier insulation (higher fill rating) will be warmer per ounce. However, in this case, there are MORE ounces of insulation in the Marmot so while not as fluffy, it will be warmer. Heavier... But warmer.

Yep. Loft (higher fill rating) is how high end bags reduce weight.