THIS PIECE COVERS THE FRONT OF THE CHEST ON THE #99TS TACTICAL SUIT.  IT IS ATTACHED WITH VELCRO STRAPS SO IT CAN BE EASILY REMOVED.  ITS THICKNESS IS THE SAME AS THE CHEST PROTECTOR FOR DOUBLE PROTECTION.  IT IS RECOMMENDED FOR LIGHT TRAINING.  IF YOU ADD THIS PIECE TO THE #99TS IT IS ABOUT THE SAME PROTECTION LEVEL AS THE #300 BASIC CHEST PROTECTOR.