Discontinued and hard to find Spenser color. Compatible with Vistas 2015 and newer; not sure about the newest Vista models. Bought, but never used.
UPPAbaby RumbleSeat V3 Second Lower Seat - Compatible with Vista V2 and Vista V3 - All-Weather Seat + Magnetic Buckle – Adapt
UPPAbaby Vista V3 Convertible Single-to-Double Stroller for Baby & Toddler, 30+ Configurations, Car Seat Compatible, All-Whee
UPPAbaby Vista V2 Stroller/Convertible Single-to-Double System/Bassinet, Toddler Seat, Bug Shield, Rain Shield, and Storage Bag Included/Lucy (Rosewood Mélange/Carbon Frame/Saddle Leather)
