THIS PIECE COVERS THE FRONT OF THE CHEST ON THE #333 POLICE TRAINING 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 HEAVY PUNCHES, KICKS AND KNEE STRIKES.  THE REGULAR #333 CHEST PROTECTOR WILL PROTECT AGAINST MOST WEAPONS IMPACT AND NORMAL STRIKES.