Expand your stroller to accommodate your growing family with this Cybex seat pack. This product adds a second full size seat to the Gazelle S into a double stroller to accommodate two children at the same time. One-pull harness lets you easily secure your child in the seat, and the separate back and leg adjustments provide multiple configurations. | Cybex Seat Pack for Gazelle S & e-Gazelle S Stroller - Stormy Blue