Peg Perego Primo Viaggio 4-35 Lounge vs Safety 1st onBoard 35 FLX

Side-by-side specs from each maker.

Only the differences are shown.

Peg Perego Primo Viaggio 4-35 LoungeSafety 1st onBoard 35 FLX
TypeInfant car seatInfant car seat
Rear-facing weight4–35 lb4–35 lb
Rear-facing heightUp to 32 inUp to 32 in
Head ruleThe top of the child head should not exceed the top of the seat back by at least one inch (2,5 cm)The top of your child's head must be at least 1 in. (2.5 cm) below the top of the car seat.
Base includedYesNot listed
Newborn insertDual Stage Cushion System: may be used from birth up to about 8 pounds (3,6 kg) or when the torso of your baby fully occupies the space between the crotch strap and the shoulder slots.Not listed
InstallationLATCH (with base), vehicle belt (with base), lap-shoulder belt (without base, European belt path)LATCH lower anchor belt (with base), vehicle belt (with base), vehicle belt (without base)
Load legYesNot listed
RotatesNoNot listed
Works with strollersPeg Perego strollers: YPSI, Z4, Vivace, Veloce, Selfie, Selfie Plus, City Loop, Booklet 50 (maker product page)Not listed
Stroller adaptersPV Adapter/Links Uppababy ($49.99), PV Adapter/Links Universal ($49.99); PV Adapter/Links Peg Perego ($19.99) for Peg Perego chassisNot listed
Handle in the carNot listedCarry handle must be upright and locked when carrying and when installed in the vehicle.
Aircraft labelCertified for aircraft, per the makerCertified for aircraft, per the maker
No added flame retardantsYesNot listed
Expires after7 years8 years
Ask the meadow

Primo Viaggio 4-35 Lounge or onBoard 35 FLX?

Answers come from each maker's published specs. Safety and health questions link to the agency or medical source.

Which is easier to travel with?

Primo Viaggio 4-35 Lounge: certified for planes, installs without a base. onBoard 35 FLX: certified for planes, installs without a base.

Still wondering? Write to us at hello@cribpicks.com and we'll look it up.