Rab vapour rise alpine jacket twilight the vapour rise tm alpine jacket now comes with a number of new features which make this light weight highly breathable softshell jacket a go to piece for summer climbing and sport use developed exclusively by rab and pertex vapour rise tm creates breathable high wicking and quick drying performance clothing the vapour rise tm alpine jacket features a fully helmet compatible hood and anti snag velcro adjustable cuffs to increase an already packe