DWR treatments, or Durable Water Repellent treatments, are processes applied to fabrics to enhance their resistance to water. These treatments create a protective barrier on the surface of the material, preventing water from soaking in while allowing moisture vapor to escape. This feature is particularly useful in outdoor gear, such as jackets and tents, where staying dry is essential. The effectiveness of DWR treatments can diminish over time due to wear, washing, and exposure to environmental factors. To maintain their water-repellent properties, it is often recommended to reapply DWR treatments periodically, ensuring that the fabric continues to perform well in wet conditions.