The base for the Primo Viaggio 4-35 is equipped with the “Right Tight System,” which easily and securely locks the base in place for added stability with either the UAS strap or the vehicle seat belt. The base has colour coded belt paths, which act as a guide for the vehicle seat belt routing. A modern design with a rounded-shape bottom allows for a better fit and is gentle on any vehicle upholstery. The Primo Viaggio 4-35 base includes a built-in anti-rebound bar for superior protection in the event of a collision.
The Chicco KeyFit edged out the other seats because it came highly recommended by NICU nurses for premature infants. It has an excellent insert that offers extra support for such babies. All three have been through extensive crash testing and offer excellent safety features, like energy absorbent foam that offers extra protection in the event of an accident. The Combi Shuttle is an especially sturdy seat that you can install with or without the base without losing any of its safety features. The Britax BOB B-Safe also has a sturdy design and is extremely easy to use. This seat accommodates larger babies than the other two do, with its weight limit of 35 pounds.