The city go isofix base is compatible with thebaby jogger city go car seat and makes lightwork of securing your babyrsquos car seat into arearward positioninstall using a carrsquos isofix anchor points whichwill ensure your car seat is installed correctly everytrip the isofix arm indicators show green whenthe car seat base has been securely fitted andred when not as well as using easy install guides there is an extendable support leg that securely fitsagainst the floor for stability prev