The Car Seat Adaptor for Baby Jogger Double Strollers has been designed to be the safest on the market. By placing the adaptor on a locking slide, an infant and a toddler can ride together by securing the car sat adaptor over one seat. If the toddler gets out of the stroller, simply slide and lock the car seat in the center of the stroller to provide an equal distribution of weight. This adapter will not work Enspira Car Seat, Intera Convertible Car Seat, Vantage Point Booster Seat, Booster seats, Toddler car seats, Chicco, Combi, Evenflo Lakewood, Evenflo St. Ives.