Bixby is a true original. Their iconic collection of utilitarian articles are engineered for comfort and crafted in small batches from the finest quality ZYL sheets. ZYL sheets were first prepared in the late 1800's, a high-performance thermoplastic derived from pulverized cotton and tree fibres valued for its soft natural feel and brilliant hues. Your Bixby comb begins with a solid sheet of ZYL, then skilled craftsmen carefully carve and heat-form the contours using traditional shaping techniques. The unique combination of properties of ZYL makes it a perfect material for optical frames and combs.