SAME WIDTH AS A SINGLE STROLLER - at just 25" the Mountain Buggy Duet is the same width as a single stroller and fits through all standard doorways NEWBORN READY - with dual, independent lie-flat seats, use of one or two car seats or the Mountain Buggy carry cot plus CONTROL HAND BRAKE - for walking, jogging and going up and down hills in any weather ONE HAND FAST FOLD - simple and efficient one-hand, standing fold that is incredibly compact TAKES TWO INFANT CAR SEATS SIMULTANEOUSLY - attach two mountain buggy protect infant car seats (sold separately) or other leading brands with the purchase of adapters STUNNING, FASHIONABLE FABRIC - including new silver & grid colorways FULL-SIZED SEATS - despite its thin wheelbase, Duet boasts full-size seats, comfortably accommodating children up to four years old EXTRA STORAGE - with zippered pockets on the rear of the gear tray. This vehicle is intended for children up to a maximum weight of 18kg / 40 pounds, Tyres and tubes - The valve is car-size. manually inflate to 20 – 22psi maximum releasing air gives a softer ride but lower pressure reduces tread life.