I used this lanolin and mink oil product on my KAVAJ cases to keep it soft and restore the suppleness in the cover edge ( shows some normal cracking/creases). Leaves no oily residue and does not darken the color. Also used it on my Apple case. Got the recommendation from KAVAJ's webpage. Also leaves a nice leather smell. Duragloss 221 White Creamy Leather Conditioner - 8 oz. Available from Amazon.