The Ypsi Stroller paired with the Primo Viaggio 4-35 Nido infant car seat, is just what you need to start new adventures with your growing family. The full-featured lightweight single to double offers more agility on the road, through narrow spaces, or in crowded areas. The Primo Viaggio 4-35 Nido comes equipped with a premium base with a Load Leg and built-in Anti-Rebound Bar.- With the purchase of \"Double Adapters\" your Ypsi can turn into a double stroller. - Base includes built-in Anti-Rebound Bar and 10 position Load Leg that work together to reduce rotation by over 50% in case of an accident. - Primo Viaggio 4-35 Nido snaps directly to chassis with ease. -Wheels with ball bearings and suspension for 360 degree agility and less effort in pushing.- The large extendable pagoda hood protects your baby’s naps from the sun and wind. The hood is also adjustable in height and follows the child’s growth. - The stroller closes with one hand with the seat attached and stands upright by itself. - The telescoping one-piece handle accommodates users of different heights and the hand-sewn eco-leather bar adds a touch of elegance.