Columbia Sportswear Women's Mach 38 Hybrid Jacket Shell: 100% polyester microfiber, 85% polyester/15% elastane. Insulation: 100% polyester lightweight insulation, 40g Imported Insulated Front and Back Panels Omni-Heat Thermal Reflective Omni-Wick Advanced Evaporation Antimicrobial, Intended to Protect the Garment from Odor Caused by Bacteria Hybrid for Stretch and Breathability