Columbia Sportswear Women's Alta Thunder Jacket Shell: 100% legacy twill nylon. Lining: 100% omni-heat reflective microtex light polyester. Insulation: 100% 80g omni-heat thermal insulation Imported Underarm Venting Omni-Heat Thermal Reflective Omni-Tech Waterproof/Breathable Critically Seam Sealed Removable, Adjustable Hood Adjustable, Snap Back Powder Skirt