From Aumorfia:

From the A_series, the ZZ_necklace is a dynamic and voluptuous necklace. Each piece is hand-cut, hand painted and connected with metal studs. Made of velvety matte leather; the result of a double side colouring process, using skin-friendly vegetable-based dyes. Every item is unique and made for you based on your measurements; in the order confirmation page, please add your neck measurements. It comes sealed with the Aumorfia's authenticity stamp in a luxury black box with a signed certificate and care guide. It's shape adopts your neck line as you wear it and the leather will soften with age.