4 layer construction with down bag fabric under shell and liner for complete down proof;Graphene lining big cargo pockets on chest and side,contrast colors with flap and hidden snap button closed; corn plastic zipper chest pkts;Special quilted sleeve elbow for movement,sleeve pocket on top;detachable hood with zipper,adjustable speak with snapbutton/velcro and stopper, adjustable waist inside with elastic cord and stopper.windproof inner cuff and outside velcro flap and velcro for adjust;