Designed for use as a full body harness for insertion and extraction (SPIE) applications. Works well for emergency egress from multistory buildings or rooftops. Dorsal D ring is used for SPIE Lanyard attacnment. Safety sternum strap with Cobra quick connect buckle for added security during SPIE usage. Sternum level attachment point allows an injured or wounded soldier to be lowered in an upright position (Used with Extraction/Personal Retention Lanyard). Cobra quick connect buckles on leg portion of harness for easy and fast donning. Designed to be worn under or over tactical web gear and body armor. 363 Harness is now approved for use by US Navy(See attached document).