Answer (posted by @mrjames): pull up leather will change colour when it bends- and it will react with the oils in your skin causing a colour change- they will age nicely, but drastically. Definitely keep them away from water, and condition them with any leather conditioner. I don't think you'd need anything specific. I'd keep polish away from them: uncoated leather and polish don't mix too well. If you need to restore the colour you have to use special dye designed for pull up leather.
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