Rab downpour jacket the rab downpour jacket is a light weight packable waterproof jacket with pit zips using pertex shield 25 layer fabric with dry touch features hem drawcord velcro adjustable cuffs 2 ykk zipped pit zips with storm flaps ykk front zip with external and internal storm flaps fully adjustable hood with flexible polymer peak and roll down closure specifications weight 11 oz 326 g material 100 nylon pertex shield 25 fabric with dry touch seam taped yes shell