No need for the little one to lose any sleep just click, cruise and snooze from stroller to car and home again. This Mountain Buggy travel system car seat adapter makes the Mountain Buggy Duet side by side stroller compatible with the Peg Perego Primo Viaggio infant car seat. As the saying goes, never wake a sleeping baby. With this Mountain Buggy travel system there’s no need to wake the baby, just transfer your little love from the car to your Mountain Buggy without so much as a peep. The Duet is capable of taking two infant car seats at one time so be sure to purchase two adapters if you need to attach two infant car seats.