The Ventus is a super lightweight pullon softshell made with Rabs fantastic Matrix SWS (Single Weave Stretch) softshell fabric. This lightweight softshell fabric will keep out wind, light rain & nasty UV rays making it perfect for aerobic mountain activities. It works best when worn over a good base layer when you are working very hard & just need a thin layer to keep off the elements. Alternatively you can throw it over a mid layer when you need a lightweight, comfortable windproof. The fabric is treated with Polygiene, a naturally occurring antimicrobial agent that lasts for the life of the garment. Polygiene is completely safe next to the skin & is environmentally friendly. If you can bear to take the Ventus off it can be stashed in its own chest pocket. The minimalist design is finished off with Lycra bound hem & cuffs with thumb loops to protect the vulnerable wrist area. Lightweight Matrix SWS fabric Polygiene treated to control odour Deep venting YKK chest zip YKK zipped chest pocket that doubles as a stuff pocket Flatlock low bulk seams Lycra bound cuffs with thumb loops Lycra bound hem Slim fit