Maxi-Cosi Petra All-in-One Convertible Car Seat – Sea Shadow

The Maxi-Cosi Petra All-in-One Convertible Car Seat grows with your child from the first ride home through the elementary years, in three modes: rear-facing car seat (5-40 lb, 19-40 in), forward-facing seat (30-65 lb, 34.4-49 in), and belt-positioning booster (40-100 lb, 43.4-52 in). Installation is fast thanks to one-click LATCH connectors, while the 3-position adjustable base and the QuikFit one-hand adjustable headrest and harness system simplify stage changes. Petra pairs PureCosi fabric, made without added fire retardant treatment, with EcoCare recycled fabric. Inserts lift out without rethreading, two removable, dishwasher-safe cup holders rinse clean, and machine-washable, dryer-safe fabrics finish the job. Engineered and tested to meet or exceed federal safety standards. Meets federal Side Impact standard. Actual fit may vary. Proudly made in Columbus, Indiana. Designed by Parents, for Parents. Maxi-Cosi embraces both heritage and innovation. We invented the car seat category in Europe over 40 years ago, and have earned the trust of parents worldwide, safely carrying over 60 million babies home from the hospital. Our infant carriers, convertible car seats, strollers, at-home, and nursery products are designed with solution-focused features to make families’ lives easier. All Maxi-Cosi products meet or exceed the ASTM International (American Society for Testing and Materials) and governmental safety standards—your family’s safety always comes first. Many of our premium products, including all Maxi-Cosi cribs, are Juvenile Products Manufacturers Association (JPMA) certified. We take great care to create each product with thoughtful details like machine-washable and dryer-safe fabrics and generous cup holders that fit into your life and make your everyday parenting journey easier. We’re committed to impeccable style and comfort. Our design-forward, trend-right play yards, bassinets, swings, rockers, and more complement your home’s décor while our premium materials ensure your little one’s comfort.
Birth Through Big Kid: The Maxi-Cosi Petra is a 3-in-1 all-in-one convertible car seat for children from 5 to 100 lb, from the first ride home to age 10
Fast Secure Setup: One-click LATCH connectors make installation straightforward, and a 3-position adjustable base for the right fit in your car
QuikFit Adjustment System: The integrated headrest and harness raise together with one hand and no rethreading, so moving your child between riding stages takes seconds
Plush Newborn Padding: Soft head and lumbar inserts cushion the smallest riders in this infant toddler car seat, and they lift out without rethreading the harness
Trusted & Tested: Engineered and tested to meet or exceed federal safety standards. Meets federal Side Impact standard.