ONLY COMPATIBLE WITH: UPPAbaby Vista (models 2015-2019), Vista V2, Cruz (models 2015-2019), and Cruz V2 strollers. RumbleSeat V2 and RumbleSeat V2+ second seat accessories When using the canopy is in the most upright position. FROM BIRTH SOLUTION: Use in stroller toddler seat in the most reclined position. Provides comfort through softly cradling child by supporting their neck and back, while the head support and wedge insert offer extra stability. COMFORT AND STABILITY: Designed with infants in mind, the Infant SnugSeat provides extra comfort and stability for your baby’s neck and back when strolling. BREATHABLE MATERIAL: Soft and breathable material keeps baby cool and comfortable during strolls. CONVERTS TO LINER: Transitions to a comfort liner when head support and wedge insert are removed for extended usage beyond the infant stage.