Today I took receipt of my Marmot Plasma 15 sleeping bag. My initial impression without opening the box was how light the package felt. It was so light I wondered at first if they sent me an empty box. Upon opening it, I laid it out upon my carpeted floor, unzipped it and climbed in to make sure It fit my body size. I am very impressed thus far but 'the truth is in the pudding" as they say and therefore, until I actually use it outdoors on some future over night hike, I cannot say if it will keep me warm through the night hours at higher elevations. The plan is to use it on the Wonderland Trail in Aug/Sept 2016.
This review was written in the old system and had content requirements that are different than reviews written today.