The DWR coating makes the fabric water repellent, so that water forms droplets on its surface and runs off instead of soaking in. This protects the fabric from getting wet quickly, providing greater comfort in wet conditions, but does not guarantee full water repellency.

H2No® Performance Standard's three-layer shell fabrics are treated with a DWR (durable water repellent) fabric finish, which repels light rain and snow. Combined with a water-repellent and breathable barrier, the DWR finish prevents saturation of the outer fabric, allowing the breathable barrier to work effectively.