The Stokke Crusi Sibling Seat kit converts the Crusi stroller into a double stroller by adding a lower seat so two children can ride together. The kit includes the sibling seat textile in Purple, two plastic seat adaptors that attach to the middle of the chassis, and a footrest that attaches to the bottom of the chassis. The sibling seat has a five-point safety harness and a protective hood with a ventilation zip, and it uses a fixed recline position. The Crusi was Stokke's multifunctional stroller before the Xplory line. Please confirm exact package contents with the store.