Size:   S：Neck：38-48cm
                                             Chest：40-50cm
                                      M：Neck：46-56cm
                                             Chest：46-56cm
                                       L：Neck：54-68cm
                                             Chest：52-65cm

                          Features:   Superior Quality
                                            Durable
                                            Comfortable
                                  1.Size adjustable.
                                  2.Easy to use.