One of the biggest threats to the life of a shoe are the elements. During the course of the four seasons your shoes can be battered by high heat, snow, rain, and sleet, all of which deteriorate the leather. The best way to fight the effect of these elements is to thoroughly clean off these corrosive materials right after wearing. The best way to accomplish this is to wipe down your shoes with a bit of saddle soap (using a clean cloth). With the other end of the cloth, condition the leather with a few drops of mink oil to return its natural shine. These products can be found in most areas where shoe care items are sold.