Each kind of leather presents specific characteristics that change according to the kind of tanning process. For this reason it is not possible to generalize the best way to take care of a leather good. We can give though some useful instructions for each of the kinds of leather described above.
Cow Hide, vegetable tanned leather and chrome tanned leather
Use a dry and clean cloth to gently brush the leather with the aid of a small amount of cleansing cream (the one used to clean your face will be fine IF IT DOES NOT CONTAIN ALCOHOL). Use neutral shoe or leather polish to moisturize from time to time.
Nabuk / Full grain leather
Carefully brush this kind of leather with a clean, well wrung wet sponge (TAKE CARE NOT TO WET THE LEATHER TOO MUCH). Do not use cleansing cream or polish, Nabuk leather is quite porous and tends to get stains and halos if treated with them. Let the leather naturally dry without using heat.
Firmly rub using a brush (a shoe brush will be perfect if the bristles are not too hard) or gently use the specific suede rubbers. Do not wet with water and do not use cleansing cream or polish.