This is a very tricky question. When “jeans” were first invented, a variation on the work pants of the day, in 1873, the whole point was to make them extra durable. A combination of denim thread and seams reinforced with metal rivets provided exactly what the well dressed work person was looking for.
Today, the term has come to mean any trousers that are made in the style of the original work pant, but with many variations depending on the purpose. I have seen silk jeans, velvet jeans, and even sequined jeans.
As to the “best jeans material” you would have to specify what the purpose of the clothing in order to choose properly.
The new manmade fabrics are very useful because they can be made nearly indestructible by the using the proper weight of thread and weave, such as twill.