How to Replace Car Seats

I was wondering how upholstery shops do their job. Just like how I am curious on any other jobs out there. This is the question that’s in my head these past few days since I saw my father in law at an upholstery shop the other day. I asked hubby on how to repair leather car seats as it’s been bothering me how they replace those very ugly seat cover and make magic to get a very nice one in the end. Hubby can’t fully explain it well to me so he said one day he will bring me to his friends upholstery shop and let me watch on how do they do it. Yey! I am so excited!