The Vienna label PECI.wien creates innovative crocheted designs that are notable for their mathematical approach and handcrafted perfection. The integration of special 3-D printed elements gives certain models of bag a particular stiffness and defines a new look. Each piece is unique because, despite the precision of the manufacturing process, a twisted or multi-colored thread at the micro-level of an individual stitch can ensure that the result is never identical. Hats are designed and calculated taking into account the reduction that occurs during the felting process. Skilled crocheters, who can put the mathematical formulas into effect, are rare – a fact that also explains why the pieces from PECI.wien are so valuable. The original designs for selected models can be acquired in the form of NFTs (non-fungible tokens).