Nuna Pipa aire rx + RELX Base in CaviarFeel the freedom to go anywhere with PIPA aire rx, fully compatible with Cruisers (using this adapter) and Switchback frames (with this adapter). Who says security can't be super stylish? Lighten your load and up your style game. That's the PIPA aire rx motto. Whether it's the sleek design elements, the Caviar color or the smart security features that catch your eye, the PIPA aire rx car seat is all about hassle free adventures with all the perks.