Danner Nubuc and Suede Waterproofing Spray
Here's what other sites are saying:
Nubuc, suede and rough-out leathers no longer have their own naturally-occuring protective barrier. It's important to waterproof them regularly because these types of leather are more susceptible to damage without proper care. Our Nubuc and Suede Waterproofing Spray won't cause them to darken in color, and is breathable, which means it blocks water from the outside while letting moisture escape from the inside. This is nice for all boots but is especially important for Gore-Tex styles.