Hang your coat effectively. Do not fold and let it like this for a significant stretch of time, as this can support wrinkles and splits in the cowhide. Rather, balance it on a wide, ideally cushioned holder in a very much ventilated storage room — never in the daylight, as that can rapidly stain the coat. This is especially significant for calfskin. Whatever you do, don't store your coat on a wire holder. You're requesting peculiar "knocks" in the shoulders. After you hang it, don't push it into your wardrobe among many different coats. Give it some space!