Any harness with a front and/or back D-ring attachment can be used for confined space entry applications. If using a hoist for lowering a worker into a confined space, you may attach the hoist to the front D-ring if that is a feature on the harness. This allows the worker to be lowered in a comfortable sitting position. Connecting to the rear (dorsal) D-ring on the harness is normally suggested because if a rescue is ever required, the lift position has less chance of interfering when being hoisted-from/exiting the confined space opening. For more information regarding Confined Spaces, check: www.osha.gov for 29 CFR 1910.146. Or Check Quick Tips #115: Confined Spaces, 29 CFR 1910.146