Jury still out
"I bought this vest intending to use it as an additional base layer for torso insulation without adding more bulk on my arms. I haven't used it yet because It runs extremely large and very baggy around the bottom hem. Since I haven't used it yet I can't comment on how warm it is but it seems rather thin for a 300 rating compared to other garments I have. I will probably give it to one of my larger bodied friends for whom it might fit better then revise my review accordingly."

