Double up on stylish functionality with the Vibe Doubles Kit. This seat attachment creates a sleek and cool inline stroller for two. Its streamlined shape makes it easy to navigate and an ergonomic design gives it plenty of functionality. When attached to the Vibe stroller, it all folds and unfolds easily -- even as a double! -- and has removable wheels. And when you're ready to go, the slide-and-lock harness adjuster will have you on your way in no time. (See "product details" for more informat