  The authors of a recent Letter [Phys. Rev. Lett. 97, 137001 (2006)] observed
enhancement of the critical supercurrent of superconducting nanowires in
external magnetic field. They attributed the obtained behavior to the presence
of magnetic moments in the samples. In this Comment we derive the conditions,
crucial for the existence of the observed behavior, and show that they explain
the key features of the experiment analytically.
