Treat shoes using the HAIX impregnation spray, which contains the relevant care substances. Apply the spray generously from a distance of 30 centimetres so as to enable the leather to absorb these substances. The shoes must then be left to dry naturally (not on the heating). If necessary, nubuck leather can be re-roughed using a brush (prior to and after use).
When using safety footwear such as forestry boots on rough terrain, be sure to treat with a non-greasy shoe cream beforehand. The cream will provide the leather with more intensive care than an impregnating spray. Constant application of shoe cream will turn the surface of the leather from rough to smooth. This may lead to colour changes in some cases.