Columbia Chugach Omni Heat Down Jacket Mens Water Resistance: Water-Repellent--Serves as a barrier against water, forcing it to bead and roll away. Outer Material: Omni-Shield--Delivers advanced water-repellent performance. Insulation: 550 Fill Down--Highest quality goose down, tested for loftiness, moisture resistance and ability to regain its loft after compression. Breathable--Allows moisture inside the garment to escape and evaporate. Promotes air flow. Zippered Pockets--Secure storage for valuables.