Nikwax Waterproofing Wax for Leather™ is a safe product to use on breathable waterproof footwear. It provides instant Durable Water Repellency (DWR), maintains breathability and replenishes tanning agents in leather. It is non-flammable, contains no harmful solvents and is free of volatile organic compounds (VOCs) and fluorocarbons. Nikwax Waterproofing Wax for Leather™ has been specifically designed and optimized for smooth leather footwear. The WaterBased formulation is directed to leaks, can be used on wet or dry leather and will not over-soften.