The Bumbleride Indie Twin car seat adapter, single, is an optional adapter bar that accepts one Clek, Maxi Cosi, Cybex, or Nuna infant car seat on the 2016 through current Indie Twin double stroller for a custom travel system. It is not compatible with 2015 or prior models due to a frame redesign, and seat fabric removal is not required. Compatible seats include the Clek Liing series, Nuna Pipa and Pipa Lite series, Maxi Cosi Mico series, and Cybex Aton series (tested with models manufactured from 2016 and later; 2024 strollers have hot shoes pre-installed). For two car seats at once, purchase the adapter set instead.