I researched every possible combination of baby products so you didn't have to. This is the stroller/infant carrier car seat combo I landed on! It's a super popular combination due to the popularity of the safety and weight of the car seat. Coupled with the ideal stroller for luxury, ease of use, and ability to easily make it a double if you plan on having another baby shortly after! In order to make the nuna and uppa baby brand products work together, you need this adapter! Thankfully this is a super common combo so it's easy to find. There are other types of adapters but this is the easiest to just take the car seat out of the car and easily snap right on! LTKbaby LTKfamily LTKbump