The Duo Double Buggy is one of the best tandems around. It comes complete with the seat units, 2 raincovers, 2 aprons and more. The seat units or stroller units can macically transform into carrycots, so no need to store additional bulky pieces. Its pretty lightweight for being a tandem too at less than 11kgs. Check out all the details and videos about the DUO in the DUO product page. Oh you can also either use our Infababy Duo car seat with the DUO, or you can buy the Maxi Cosi adapters and use your own car seats, or even a Cybex or a Kiddy. There are so many options witht the Duo.