The Cudworth Black Silk Knot Cufflinks are the most versatile pair in the silk knot range, sitting quietly under a jacket sleeve and working with almost any shirt colour. Each cufflink is built from two woven artificial silk knots joined by a flexible cord, so there is no rigid metal to catch on your cuff, your desk or a laptop. The knot compresses to pass through the buttonhole and springs back to hold the cuff closed. Thread them through before you put the shirt on, which is why silk knots are often called bachelor cufflinks. Materials: Artificial silk.