STORMTECH Thermal Shell™ Insulation. (Shell) 90% Recycled Nylon/ 10% Spandex Poplin - 70g/m². (Shell-Secondary) 84% Recycled Polyester/ 16% Spandex - 195g/m². (Lining): 100% Recycled Polyester. High-Density Brushed Back Knit Panels.