The compound's band structure exhibits a double Dirac cone, enabling Dirac fermions.  A 30 meV gap separates the cones, which indicates the quantum Hall effect and massive Dirac fermions.  Close measurement of the Fermi surface via the de Haas-van Alphen effect suggests that the massive fermions also exhibit Kane-Mele-type spin-orbit coupling.
FeSn can also host magnetic skyrmions, but these typically require high magnetic fields to nucleate.  For samples with a small (but nonzero) thickness gradient, only a small-amplitude (5-10 mT), direction-variant magnetic field suffices to nucleate the quasiparticles.