Dirt on Nappa leather can be removed with a brush or a soft cloth. Anything that does not come off, can also be wiped off with a damp cloth. After cleaning, the appropriate care product should always be applied thinly. Then wait for the shoe polish layer to dry and polish the leather with a particularly soft cloth. With shoes that are equipped with GORE-TEX , it is important not use care poducts, which could inhibit the functionality of these features.. To prevent this, the use of products containing high amounts of fat or oil is advised against, as these can impede the breathability of the outer material.