After wearing the jacket for a while it does get dirty. And this is more common when you live in industrial areas where there is a lot of pollution. So how do you clean a jacket? First thing to do is remove the liner. This can be removed by unzipping it (if your liner is removable). You can wash the liner like anything else. Refer to your jackets recommended cleaning instructions for proper cleaning procedures. You can also take off the sleeves (if removable) and clean them the same way. The basic way to clean the jacket is by washing it like all other jackets. Worst case scenario is to take the jacket to the cleaners and have them do it.