Generally, using your belt and wallet on a daily basis allow them to soak up enough natural oil. Yours. Every now and then, give them a light coating of Red Wing oil, conditioner, or Bear Grease. Let it dry for 24 hours after applying. Beware that using a conditioner or oil will darken the leather. Apply with a brush, soft cloth or fingers. Give them a nice buff with a clean brush or cloth as well.
*Always test care products on a small area before use