Mockingbird 2nd Seat Kit 3.0 – Compatible with Mockingbird Single-to-Double Strollers – Seat Expansion – Includes Expansion Adapters – Black Windowpane

Price: $175.00
(as of May 16, 2026 03:26:23 UTC – Details)
Buy On Amazon

Product description

1 stroller, 44 ways to ride

The Stroller starts as a single and can expand to a double with the 2nd Seat Kit as needed.

With our accessory options you can create the perfect setup for your family at every age and stage.

Strolling with an infant? Start here.

Our lie-flat Bassinet is perfect for leisurely strolls with your infant from day one. It’s our most roomy, cushioned infant seating option, providing a flat, cozy space for your newborn.

Be ready for any adventure.

The Car Seat Adapter makes the Mockingbird stroller compatible with more than 40 of the most popular infant car seats – so you can easily go from vehicle to Stroller and back again.

Planning to stroll with 2+ kiddos?

The 2nd Seat Kit lets you expand your Single-to-Double Stroller to stroll with two kiddos. It includes a second stroller seat and a set of adapters to create room for two seats.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. 2nd seat kit Merchant Video

Features & Use The 2nd Seat Kit 3.0 comes with one seat, a set of upper adapters (to raise your 1st Seat and make room for the 2nd), and a set of lower adapters (to attach the 2nd Seat). The 2nd Seat Kit 3.0 comes with all of the updated features of our 3.0 strollers, including Mockingbird’s FullShade System, reversible seasonal seat liner, and an updated harness with magnetic buckle, softer straps, and reflective piping for safer nighttime strolling. Compatibility The 2nd Seat Kit 3.0 is compatible with all models of the Mockingbird Single-to-Double Stroller. Strolling with two infants: For twins, we recommended using the 2nd Seat Kit 3.0 with two Infant Seat Inserts or with two Car Seat Adapters. Strolling with an infant + toddler: To stroll with an infant and an older kiddo, you’ll need the 2nd Seat Kit to make room for two riders, as well as one of our three infant accessories (strongly recommended until your newborn develops head and neck support). Age & Weight Guidelines Unlike other two-seat strollers, our top and bottom seats are identical, so they have the same weight limit. You can use both seats with children up to 45 lb. The maximum headroom from the seat to the canopy is about 20″. Cleaning & Care To clean, wipe with a damp cloth and mild detergent (if necessary). The reversible seat liner is machine washable, and other stains can be removed by wiping clean.

WHAT’S INCLUDED: Comes with the 2nd stroller seat (that’s identical to your Mockingbird Stroller 3.0 seat), as well as a set of Upper Adapters and Lower Adapters needed to make room for two riders.
ENABLES DOUBLE MODE: The 2nd Seat Kit expands your Mockingbird SIngle-to-Double Stroller to double mode in under a minute, no tools required.
INTERCHANGEABLE SEATS: The seat in Mockingbird’s 2nd Seat Kit 3.0 is identical to the seat included with the Mockingbird Single-to-Double Stroller 3.0. 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.
FEATURES: Includes the same features as the Mockingbird Single-to-Double Stroller 3.0’s seat, including Mockingbird’s FullShade system, which pairs their XL UPF 50+ canopy with the new built-in LegShade for head-to-toe coverage sun coverage. Other parent-favorite features include the magnetic buckle, height-adjustable canopy, reversible seasonal seat-liner, and more in-seat storage.
COMPATIBILITY: Compatible with the Mockingbird Single-to-Double Stroller (all models)
Cannot be used with the Mockingbird Single Stroller