This spray was awesome for waterproofing the nubuck part of some
boots. It darkened them a little and you have to be careful to treat each shoe the same, with the same amount of pre-watering and spray, so they'll look alike, but when I'm out in the rain, the nubuck doesn't ever even look like it got wet! I live in Seattle so the rain's not been super-heavy, but I'm very happy with the results!