The Mountain Buggy Duet ™ Twin Bundle includes all you need for your little boo's in one easy package. Featuring 2 x all-new Mountain Buggy protect™ i-size Infant Car Seats 2023 with Isofix Bases and including Mountain buggy carrycot plus™ for twins, as well as key accessories for getting out and about. The Mountain Buggy Duet ™ Twin Bundle includes: -. 1 x Mountain Buggy Duet ™ (Black, Silver or Grid). 2 x Mountain Buggy Protect™ i-size Infant Car Seats 2023 with Isofix Bases. 1 x Mountain buggy Carrycot plus™ for twins (Black). 1 x Mountain Buggy Duet™ Double sun cover set. 1 x Mountain Buggy Duet™ Double storm cover. 2 x Mountain Buggy Duet™ Twin car seat adaptor for protect™.