Never opened, upper adapters for Uppababy Vista, 2015 and newer. Raise your baby’s seat up closer (great for tall parents), or use in co junction with rumble seat / bassinet/ car seat on the bottom. We had a set already, and we’re gifted these when we got an unopened rumble seat on marketplace, so passing on to someone else! Box does have a slight water or coffee stain on it, but is still sealed.