Lightweight and breathable, the Military Spec Sport Vest features articulating spine protection panels that move with you, allowing full range of motion. New chest plate provides maximum airflow. Full articulating spine protection that moves with you. Adjustable shoulder straps. Adjustable kidney belt. Foam impact chest protectors. Low-profile design fits under most jackets.. New chest plate provides maximum airflow. Sizes: S/M, L/XL, XXL. Military Spec Hi-Vis, S/M