I absolutely condition anything that's leather - skirts, boots, shoes, handbags and jackets. I buy a leather conditioner from the place I've bought a couple of leather jackets from. You have to test a small section in a hidden spot first to ensure that the item is colour fast, and then once you've determined that, you pour a small amount of the conditioner on and rub it in with a clean soft cloth. It keeps the leather supple and soft, and maintains a nice sheen.