I bought the electron yellow jacket and have found that it is just the ticket when worn as a VERY warm mid layer under a waterproof, breathable shell, also electron yellow, by same manufacturer. You will NOT be disappointed with this jacket. I have worn both the Phantom hooded jacket and the shell during a blizzard at about 15 degrees below freezing and I was as dry as a bone and as warm as toast.
This review was written in the old system and had content requirements that are different than reviews written today.