Original US Navy MK-1 Inflatable life jacket. The vest is equipped with all accessories for lifesaving situations – including a life jacket, a whistle, a flashing light set (ACR I701), and a dye marker. The equipment can be stored in the easily accessible hook-and-loop pockets and on the hook-and-loop shoulder patch. Reflective elements improve visibility, and the outer material is a durable, fire-retardant blend of cotton and high-tenacity nylon twill. The vest inflates automatically in water or manually by pulling the inflation cord or using the mouthpiece. The vest is unused with slight storage marks and is in excellent condition. A matching yellow sweater is included. A very nice original set in excellent condition.