Common features include a quick, no-tools attachment, color-coded dot indicators for correct orientation, an easy open/close mechanism, and a closure lock to secure the car seat to the stroller.
Most product descriptions indicate the stroller folds with the adapters installed. Some adapters are designed to adjust or tuck down so the stroller can fold while they remain attached, but specifics vary by adapter model.
Adapters are made from materials such as polyurethane and PVC. Care instructions across listings recommend spot cleaning or wiping the adapters clean.
Most listings state no certifications are listed. At least one listing explicitly notes it "Meets ASTM Standards."
Creating a travel system means the adapters allow select Nuna infant car seats to attach directly to the stroller frame so you can move a child from car to stroller without unbuckling them from the car seat.
