What Our Gearhead® Experts Are Saying: "I use Fabric & Leather Proof on my hiking boots every season—especially the mixed-material ones that start soaking up water around the toe box. This treatment brings back clean beading, keeps leather from absorbing moisture, and noticeably improves breathability on long hikes. It’s super easy to sponge or spray on, and it never leaves the leather greasy or over-softened."We reach for Nikwax Fabric & Leather Proof whenever our trail shoes, hikers, or mixed-material boots stop shedding water the way they used to. Modern hiking and trekking footwear relies on breathable, waterproof membranes and durable outer materials to keep feet dry through creek crossings, wet grass, and long miles in the rain. When those surfaces start absorbing moisture, performance drops fast, and that’s where this treatment shines. Fabric & Leather Proof restores durable water repellency across synthetic panels, leather sections, and combination uppers. The formula prevents wetting out while still allowing moisture vapor to escape, so our feet stay warmer, drier, and more comfortable in variable weather. And because it won’t soften or weaken leather, we can use it confidently on everything from ultralight approach shoes to rugged waterproof boots we depend on for backcountry missions.