Durable Water Repellent (DWR) is a treatment applied to fabrics to make them resistant to water. It works by creating a protective layer on the surface, causing water to bead up and roll off instead of soaking into the material. This feature is commonly found in outdoor gear, such as jackets and tents, enhancing their performance in wet conditions. DWR treatments can wear off over time due to factors like washing and abrasion. To maintain its effectiveness, it is often recommended to reapply DWR products after several washes. This helps ensure that items like hiking gear and rain jackets remain functional and comfortable in rainy weather.