Nikwax Waterproofing Wax for Leather restores water repellency and reduces water absorption of smooth leather. Works immediately after treating and will not soften leather. Safe for GORE-TEX. Easy sponge-on application. Water based, biodegradeable, and contains no PFCs, VOCs, optical brightners, or added scents. Clean first with Nikwax Footwear Cleaning Gel for best results.