Breathable, waterproof shoes can quickly become soaked and wet from the inside under damp and wet conditions. When nubuck or suede absorb water on the shoe's surface, the breathability of the shoes is reduced. The durable water repellent (DWR) feature of your shoes must be maintained to ensure comfort while wearing them. Once the effect diminishes, it can be renewed with Nikwax Fabric and Leather Proof™. Nikwax Fabric and Leather Proof™ has high-grade durable water repellent properties (DWR) that develop when air-dried. It leaves a flexible water-repellent layer on individual fibers of fabric and leather. This allows moisture to escape during evaporation, maintains breathability, and keeps your feet dry. Nikwax Fabric and Leather Proof™ is specifically designed and optimized for shoes made from a combination of fabric and leather materials.