Nikwax, Creme Waterproofing Wax for Leather;

You love your leather gloves and boots, except when they get soaked through in a snowstorm or on a wet hike. Waterproof and protect your leather goods with the Nikwax Creme Waterproofing Wax for Leather. This concentrated blend of water-based waxes enhances the water-repellent properties of the leather without compromising breathability, so it won't interfere with the action of Gore-Tex or eVent inserts.