Bertini Bertini baby strollers are the among the world's best 4 wheeler strollers. The Bertini stroller range is funky and stylish as well as lightweight and strong, perfect for birth to toddler years. Bertini strollers are available in both the X series and Z series. Bertini strollers are amongst the smoothest baby strollers on the market and are manufactured by Australian company IGC Dorel, who also manufactures the Mother's Choice and Bootiq range of buggies and strollers.