#sidr-0-button{
  background: url("/sites/campusservicecenter.harvard.edu/themes/housing/images/Menu_Button.png");
  background-repeat: no-repeat !important;
}

.sidr_IconX{
  background: url("/sites/campusservicecenter.harvard.edu/themes/housing/images/MenuIcon_X.png") !important;
  background-repeat: no-repeat;
}