The Mockingbird 2nd Seat Kit allows you to convert your Single-to-Double Stroller to double mode. It comes with a 2nd stroller seat, as well as a set of adapters to make room for two riders.
Unlike many convertible strollers’ add-on seats, the seat in Mockingbird’s 2nd Seat Kit is identical to the seat included with the Single-to-Double Stroller. This means you can stroll in double mode with two kids up to 45 lbs, and you can choose to have your younger child closer to you.

• CONVERT FROM SINGLE TO DOUBLE: Pair with your Mockingbird Single-to-Double Stroller to expand from one to two seats. The 2nd Seat Kit 3.0 includes upper and lower adapters (to create two-seat capacity), and a second stroller seat.

• FULL-CAPACITY 2ND SEAT: Unlike many other convertible double strollers, the seat in the 2nd Seat Kit is the same size as the seat that came with your Single-to-Double Stroller, so you can ride with two kids up to 45 lb and get more years of use out of your stroller.

• MAXIMUM FLEXIBILITY: Reversible, reclinable seats and 44 seating configurations allow you to mix and match attachments—no tools required.

• HEAD-TO-TOE SUN PROTECTION: Patent-pending FullShade™ system with extendable UPF 50+ canopy and new LegShade™

• ADJUSTABLE COMFORT: Reversible seat with 5-position recline, height-adjustable canopy, and reversible seasonal seat liner

• INFANT-COMPATIBLE: To expand to double mode with an infant, use the included upper and lower adapters with one of our infant-accessories (sold separately): a cozy lie-flat Bassinet, space-saving Infant Seat Insert, or Car Seat Adapter that is compatible with more than 40 of the most popular infant car seats.

• Dimensions (Overall): 35 Inches (H) x 15 Inches (W) x 9 Inches (D)