Columbia Sportswear Women's Whirlibird Mitten Shell: 100% nylon Legacy Twill. Lining: Omni-Heat Reflective. Insulation: 400 gm microtemp. 260gm Microtemp Imported Abrasion Reistant Omni-Heat Thermal Reflective Omni-Tech Waterproof/Breathable Bladder 3-Point Precurve PU Grip Palm