You can usually buy these products (usually labeled as "leather therapy," "restorer," or "conditioner") at stores that sell saddles and bridles for horses. You may also use leather treatment products that are designed to soften, clean, and polish leather shoes.  Many of these ointments will actually strengthen leather. They were designed for use on saddles and bridles, and you can trust them as a lasting solution. Be aware that leather treatment products are usually more expensive than natural oils, Vaseline, and rubbing alcohol. Pick up one of these ointments if you have money to spend on pampering your belt. Most products will have specialized instructions listed on the bottle or tub of leather ointment. Spray, spread, or rub the conditioner into the leather and let it soak. Apply as needed. Let the belt dry before you wear it.
اشترِ بلسمًا مخصصًا للجلود الطبيعية. ضع البلسم على الحزام.