Worried about how you are going to get both of your little ones into the same stroller? Look no further than the UPPAbaby Vista Upper Adapters to give you exactly what you need. These adapters provide you with the capability of adding in a second seat on your stroller with ease. It also helps to create additional space between the main seat and the secondary seat. No tools are needed to install the adapters. They are even color-coded to make sure you have them properly installed. The stroller folds down with the adapters on as well for ease of use. They are compatible with the 2015 VISTA toddler seat and bassinet and the MESA infant seat.