Bought this as a companion to my much-loved Mont Bell Thermawrap jacket, and it delivers the same excellent quality. Very lightweight, reasonably compressible into the included stuff sack (doesn't stuff down as small as down would, but unlike down it will retain its warmth even if it gets a bit wet), It has excellent warmth-to-weight ratio--kept me warm enough to hang out on a 9,100K peak recently
This review was written in the old system and had content requirements that are different than reviews written today.