Spirella Catalogue (1933) — Page 93 (1933)
“ The abdominal control, upward and backward, and the lower back control, upward and forward, unite to give a binder effect around the hips. The forward pressure on the sacrum (lower part of the spine) and backward pull over the hip bones hold with a firm grip and bring marked relief to the sacro-iliac strain. The anatomically shaped binder attachment reinforces and maintains the supporting pressure around the hips in all positions. ”
