Which material is best suited for fabricating a cross back strap in a figure of 8 harness?

In the context of a figure of 8 harness, inelastic strapping is the most suitable material for fabricating a cross back strap. This selection is based on the need for stability and support in the harness design. Inelastic strapping provides the necessary firmness and resistance to elongation, ensuring that the straps hold their shape and position during dynamic movements. This is critical for maintaining the proper alignment and positioning of the harness on the patient's body.

In contrast, elastic strapping would allow for stretching and movement, which could result in improper fit and support, compromising the harness's effectiveness. Velcro straps, while versatile and easy to use, might not provide the rigidity needed for a secure cross back strap. Leather strapping can offer durability but may not be as adjustable, comfortable, or lightweight as needed in certain applications. These factors collectively highlight why inelastic strapping is the optimal choice for ensuring the proper function and stability of a figure of 8 harness.