100% polyolefin. Base: acid etched steel, brass or copper; plastic spacers. Notes: the tubular knit Chain Outdoor is produced with a group of yarns in different colour, in a quantity suited to create the different mélange tones in the collection; this characteristic of the material does not guarantee a uniform and constant mélange tone overall the length of the knit, not even in the same production lot. The particular etching of the bases is made by De Castelli on an exclusivity basis.