Layering the leather and fur vest a great outerwear option. The leather can be removed and just wear the fur when you are inside. Gold hoops will also look great with this!
The fur vest and the muff are both optional. I would advise picking one depending on the occasion. If you choose the muff I would forgo the necklace. I love the muff because it can be worn over the gray winter coat but then also kept on inside for a cute outfit finisher.