Wilson's Leather Informative - Leather Care - Leather Lotion/Protector
Leather is a relatively expensive, but very worthwhile material. As such it needs to be cared for as any investment.
Speaking as a prior employee of Wilson's Leather, the lotion and water-based protection they offer is easy to use, and very effective. I would highly recommend buying the protection for all leather products and the lotion to restore old leather goods. I still use and recommend the products for leather goods of various manufacture.