I opened the package and tried it on. This is an active-spec insulation jacket featuring a special stretch fabric and a new material, "Thermo Fluffy," jointly developed with Teijin Frontier. Thermo Fluffy, which artificially reproduces down balls with ultra-fine microfibers and hollow fibers blended into granular cotton, offers the same warmth, lightness, and bulkiness as down, while also being easy to maintain, making it an ideal insulation material for outdoor wear. A lightweight and warm nylon down jacket. - Color: Gray - Size: M - Material: 100% Nylon / Filling: 100% Polyester Thank you for viewing. Gender...Men