Trew Gear Polar Shift Jacket: reversible! 60-gram PrimaLoft ONE synthetic insulation, knitted in a diamond-quilted pattern and covered in 15-denier double-ripstop nylon shell—ideal for mid-layering in cold conditions and as a stand-alone jacket in the 20s. The hood is fully insulated, the elastic cuffs have thumb loops, and the whole 12-ounce package can be shoved into an included stuff sack for easy storage. Men’s small but fits more like a medium