UPPAbaby Mesa I Size Car Seat Base?   The UPPAbaby Mesa Base offers an extra, easy-to-install base for your Mesa Infant Car Seat, providing flexibility for multiple vehicles. Whether for use in family cars, relatives’ vehicles, or with babysitters, this base eliminates the need for swapping car seat bases, making travel more convenient and hassle-free.   Features SmartSecure? installation system makes setup quick and easy for busy parents. Tightness indicator ensures proper installation with red-to-green feedback. Built-in lock-off for a secure and safe seatbelt installation. Dual-level indicators ensure the correct angle and positioning. Low-profile base design ensures it fits seamlessly in your vehicle. Smooth, finished bottom protects your car?s interior from dam