The Evenflo 
                                Sonus is part of the
                                Car Seats test program at
                                Consumer Reports.  In our lab tests, Convertible Car Seats
                                models like the Sonus are rated on multiple criteria, such as those
                                listed below.
                            
                                                        
                                Ease of use:
                                Our judgment of how easy each seat is to use including the clarity of labels and instructions, adjustments of clips and buckles, the transition of the seat from rear facing to forward facing and installation features such as LATCH connections and top tethers.
                            
                                                        
                                Rear LATCH:
                                Rear-facing installation using the LATCH system.
A rating of how compatible, easy and secure a child car seat can be correctly installed in certain test vehicles. This rating is based on a rear-facing installation using the LATCH system.
                            
                                                        
                                Rear belt:
                                Rear-facing installation using vehicle seat belts.
A rating of how compatible, easy and secure a child car seat can be correctly installed in certain test vehicles. This rating is based on a rear-facing installation using the vehicle belts.