The SAM Pelvic Sling II is the first and only force-controlled circumferential pelvic belt scientifically proven in peer-reviewed studies to safely and effectively reduce and stabilize open-book pelvic ring fractures. The SAM Pelvic Sling II was designed not to over-tighten or under-tighten, unlike other commercial binders which allow unlimited force to be applied to the patient.Researchers at Legacy Health System utilized cadaver studies and clinical trials to determine the optimum range of force required to safely and effectively close an unstable pelvic fracture.