Highly breathable and fast drying Octayarn Warp-knit insulation is combined with Mountain Equipment's 20D RS shell fabric in the front of the body for wind resistance.Pontetorto® Tecnostretch fleece panels in the back and sides minimise bulk and dry fast after a strenuous ascent.FeaturesLightweight 20D RS Nylon outer fabric is wind resistant with mechanical stretch and FC free DWROctayarn Warp-knit lining for exceptional insulation breathability and comfortPontetorto® Tecnostretch 187 fleece [back and side panels]Active fitFlatlocked seams for next-to-skin comfortYKK® centre front zip2 zipped hand warmer pockets and 2 Napoleon chest pocketElastane bound hem and armholesPacks into pocket with twin karabiner carry loops Mountain Equipment Mens Switch Vest - Dusk