For rescues that may require inversion, which class of harness is full-body and meant for fall protection?

The correct choice is Class 3 harnesses, which are designed for full-body support and are essential for fall protection situations. This type of harness provides a secure fit around the shoulders, torso, and legs, making it suitable for various rescue operations, including those that involve inversion. Class 3 harnesses are engineered to distribute forces across the body in the event of a fall, which is crucial in maintaining safety during technical rescues.

Inversion scenarios, where a rescuer may find themselves head-down or at unusual angles, demand a harness that offers maximum support and stability. Class 3 harnesses are equipped to handle these conditions effectively.

Other classes of harnesses lack the comprehensive support that Class 3 provides. Class 1 and Class 2 harnesses are typically used for specific applications, like those requiring minimal support in simple scenarios, but they do not offer the full-body protection necessary in potential fall situations while performing rescues. Class 4 harnesses, while not commonly recognized in the standard classification, may refer to specialized uses or fall protection for specific applications that do not equate to the functionalities of Class 3 harnesses. Therefore, for situations requiring inversion and full-body support, Class 3 is the most appropriate choice.