Position specific or positional lower back supports are back belts that are named according to which part of the back they protect. Core Lumbar back belts and supports from VertiBaX sit lower down on the lower back, covering the upper hip and core muscle groups, key muscles that help to stabilize the vertebrae and disc structure of the lower back. Sacroiliac back belts help to stabilise the sacroiliac joint or SI joint (SIJ). This is the joint between the sacrum and the ilium bones of the pelvis, which are connected by strong ligaments. In humans, the sacrum supports the spine and is supported in turn by an ilium on each side. The joint is strong, supporting the entire weight of the upper body. For further information please follow the links on the back support product pages below: