US Military UCP Enhanced Side Ballistic Insert ESBI Pouch Marine Pattern The pullover's adaptability allows it GOV00000111 The pullover's adaptability allows it to be effectively worn as a standalone item or as an underlayer for added insulation It is designed to provide additional protection to the lower abdomen and groin area from fragmentation and limited ballistic threats The US Military UCP Enhanced Side Ballistic Insert ESBI pouch is a protective carrier designed to hold compatible Enhanced Side Ballistic Inserts on body armor systems It provides secure retention of side armor plates to increase torso protection during combat and tactical operations