Sheps 100% Pure Neatsfoot Oil is used on leather to soften, recondition, preserve and as a water repellent. It is best for use on items made of tooling leather, vegetable tanned leather, saddle leather, harness leather and other leather articles subjected to rugged use and exposure. The main function of pure neatsfoot oil is to restore the evaporated oils in leather. It lubricates the fibers which restores suppleness to the leather. Neatsfoot oil will darken lighter colored leathers.