The ultimate lightweight thermal regulator, Primaloft Gold Active Vent insulation works alongside our FEATHERLITE Air fabric to trap warmth and resist wind whilst allowing moisture to flow freely away from the body Stretch materials including the THERMO Grid fleece side panels work alongside articulated fit to ensure freedom of movement, creating a truly adaptable active insulation that can be worn as both a midlayer or standalone piece FEATHERLITE™ Air Mechanical stretch ripstop woven using fully dull 20 denier recycled nylon yarns Developed for high wind resistance with exceptional breathability, providing soft quiet yet outstanding comfort and uncompromised performance PFC/PFAS Free DWR Zoned insulation for core body warmth and protection Fleece side and under arm panels for comfort, excellent moisture management and freedom of movement Low profile seams throughout increase durability and comfort