Nikwax Fabric Leather Proof adds water repellency and prolongs the life and performance of all fabric and leather combination footwear - work fashion leisure and sports It is also safe to use on footwear with breathable membranes such as Gore-Tex Symatex eVent etc without effecting the breathability The solution is easy to apply and can be used on wet clean shoes The Fabric and Leather proof is a water-based solution that contains no fluorocarbons and is biodegradable It is also non-flammable and non-hazardous leaving it environmentally friendly The solution will not affect cosmetic appearance nor soften leather