This wintry, magical top was featured in Anna Sui's 2015 collection - see photos. The label indicates frequent collaborator James Coviello's contribution. I think this is alpaca wool (I crochet a lot)-- very soft, warm, and substantial, with prismatic teal and sage colors visible in the close-ups. The front panel is truly unique-- a black & white crocheted insert made to appear like formalwear, but in the same material, stitch, and style as the rest of the piece.