Wow, I didn't mean to get you all upset! Jill Sanders is indeed a great designer. I think what my husband was saying was that if you are going to purchase a high-end leather jacket, for over $1000.00, you really want it to last, not stretch, and be protected. If the jacket were $150.00/ 200.00, then the worry is less.
Claudia, you are right, but is the raw side of the leather facing your skin, or a finished side? All dyed leather skins have an unfinished side, kind of rough like suede, and the side you see, that is not only dyed, but finished with a sealing glaze to protect the dye.
Btw, shoes and boots are generally made with cow, calf, kid/goat, even pigskin leather, as lambskin is too soft to last, unless the wool is left on it, as in Uggs. There are lamb boots, shoes etc out there, but very pricy. The process to dye each type is different.
Aargh!!! I feel like a teacher, and I was already exhausted from home-schooling today!
Good Luck with your jacket!