The comfort of waterproof footwear is dependent on it supporting feet and being breathable. The structure of leather and therefore the level of support it provides is maintained by tanning agents. When leather absorbs water, tanning agents are lost, which causes leather to stiffen.
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.