i-Size base with Isofix connectors. The i-Size base is the safest way to attach the car seat to the car. Approved in compliance with the ECE R 129 standard, it is easily attached to the Isofix attachments of the vehicle without using the safety belt. Compatible with the following car seats: Primo Viaggio Lounge, Viaggio FF105, Primo Viaggio SLK.Check the list of car models equipped with ISOFIX attaching system.Learn more