It is important to note that the Ultimate 2 stroller wagon with car seat adapter is designed to integrate with Maxi-Cosi car seats and Nuna car seats. Please refer to the chart below to ensure a secure fit. Maxi-Cosi car seat: AP, XP, Mico(30, Max 30, Max Plus) Nuna car seat: Pipa, Pipa Lite, Lite LX, Lite RX, and RX