Again, it's how the leather was tanned and where on the animal it came from. I saw that a few of the jackets shown were motorcycle coats. A real motorcycle coat has 2 purposes, to keep the wind out and to protect from abrasion should you go down. There isn't any other material that will slide on pavement without coming apart or melting, that's the reason bikers have always preferred leather. Even the styling of a motorcycle coat has a purpose. It has become stylish to wear a motorcycle coat so a lot of the ones you see that look like a motorcycle jacket really aren't.