Nikwax Fabric & Leather Proof™ is a safe product to use on breathable waterproof combination footwear. It is completely non-flammable, contains no volatile organic compounds (VOCs) and is fluorocarbon free. Nikwax Fabric & Leather Proof™ has been specifically designed and optimised for fabric and leather combination footwear, providing Durable Water Repellency (DWR) whilst maintaining breathability. You don’t need to wait for your footwear to dry before application. This proofer is a sponge on, water-based, environmentally friendly product from Nikwax.