Nikwax Fabric & Leather Proofis easy and quick to apply; either spray or sponge on to wet shoes. Nikwax Fabric & Leather Proofprovides highly Durable Water Repellency (DWR) which develops on air drying. It leaves a flexible water repellent treatment on individual fibres of fabric and leather. This allows moisture vapour to pass through, maintaining breathability and keeping your feet dry. Nikwax Fabric & Leather Proofhas been specifically designed and optimized for fabric and leather combination footwear.