Polarization maps and corresponding magnetic field structure of B335. Top-left: polarization map of B335 in the near-IR (Js band, 1.24 μm, overlaid on a DSS intensity map; Bertrang et al. 2014). Top-right: polarization map of B335 at 214 μm (overlaid on the SOFIA/HAWC+ intensity map; this publication). Bottom-right: polarization map of B335 at 1300 μm (overlaid on the ALMA polarized intensity map; reuse of Fig. 1 in Maury et al. 2018). Shown is the derived magnetic field direction. The arrows indicate the outflow direction. Bottom-left: polarization map of B335 at 870 μm (overlaid on the ALMA contour map; Yen et al. 2020, ©AAS. Reproduced with permission). Shown is the derived magnetic field direction.