Embedding the Standard Model symmetry group in higher-dimensional theories often results in additional gauge groups at low-energy that have observable consequences at collider experiments. One such extension that appears in some string inspired models and supersymmetric scenarios is an additional SU(N) with fundamental fermions similar to the quarks of QCD. However, in these scenarios, the confinement scale of the interaction is smaller than the mass of the fundamental fermions, which results in an exponential suppression of string breaking by spontaneous production of fermion-antifermion pairs, as happens in QCD jet fragmentation. In this case, the fermions, called quirks, carrying an additional charge, called infracolor, are bound in pairs that have a QCD-like string between them that can be macroscopic: perhaps meters long.