Columbia Women's Black Diamond Dash Parka Water Resistance: Waterproof--Treated fabrics and specially designed zippers, closures, and seams completely seal out water and rain. Outer Material: Omni-Tech--Waterproof and breathable fabric construction that prevents rain, snow and moisture from reaching the interior of the garment. Insulation: 50% polyester, 50% recycled polyester--A lightweight synthetic insulation that helps to trap your warmth in. Breathable--Allows moisture inside the garment to escape and evaporate. Promotes air flow. Seam Sealed--Seams equipped with a barrier against water for a completely waterproof garment.