  It is believed that pulsars are neutron stars or strange stars with crusts.
However we suggest here that pulsars may be bare strange stars (i.e., strange
stars without crust). Due to rapid rotation and strong emission, young strange
stars produced in supernova explosions should be bare when they act as radio
pulsars. Because of strong magnetic field, two polar-crusts would shield the
polar caps of an accreting strange star. Such a suggestion can be checked by
further observations.
