N33 0770 Leather Posture Collar. Bold and breathtakingly sexy, this luxury leather choker from Italian leather designers 0770 is sure to turn heads. Handcrafted from vegetable-tanned leather, the N33 Posture Collar is durable and beautiful. The wide leather piece features black accent stitching and an inner ruby red pop of colour. Two buckles on the back provide an adjustable fit.