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Diono Rainier Convertible Car Seat Review

Diono Rainier Convertible Car Seat Review

The Diono Rainier Convertible Car Seat is revolutionizing the car seat industry. It is the ultimate in car seat safety boasting extra deep side walls which provide enhanced side impact protection and comfort.

The car seat industry has changed quite a bit in the last decade, so you want to make sure you choose a car seat that fits today’s safety standards and quality.

Diono is a corporation based in Sumner, Washington. They were founded in 1999, and they specialize in child safety seats, as well as travel strollers, and other products.



Features of the Diono Rainier Convertible Car Seat:


The Diono Rainier Convertible Car Seat is durable and flexible. The frame is made from steel, giving the device a durable lifespan of over 12 years.

Height & Weight Limits

This car seat can fit rear facing children up to 50 pounds, and front facing children up to 90 pounds. The booster mode holds kids up to 120 pounds with a maximum height of 57 inches.

Space Saving DesignDiono Rainier Convertible Car Seat

The Rainier gives your child ample room to remain comfortable while not taking up much space in your car, thus leaving room for other passengers.



We all want our children to be as comfortable as possible, and the Diono Rainier car seat provides just the right amount of cushioning so your child will ride in comfort and safety. The seat has a two-piece, soft infant body pillow which provides extra comfort and support. In addition to this, a memory foam cushion is professionally tucked in its storage compartment at the base of this fantastic seat. The height and weight of the child do not matter as it contains side bolsters which can accommodate even large children. Expandable sides and a long seat bottom provide leg support for comfy road trips.


The Rainier convertible car seat contains 12 position options which adjust the head support and the position of the car seat, making sure your child has ample leg room, and neck safety. From newborn to young child, you can adjust this car seat in many positions for safety and comfort.

Diono Rainier Convertible Car SeatSafety

Inside the walls of the seat is an energy absorbing foam making the head and the body side of the child maximally protected. The seat of Rainier convertible car seat allows you to tether it to the rear of the vehicle for forward-facing children, making it immovable.

Aluminum reinforced adjustable headrest and extra-deep side walls surround your child’s head and body for complete side impact protection. The full steel frame is unmatched in strength and safety.

Rainier offers a “Safe Stop” feature for young children and infants who are facing forward. The harness strap must be detached from the splitter plate and instead attached to the hook of the Safe Stop. The harness needs to be above or at level with the kid’s shoulders. For older children, the harness pads need to be a bit larger for efficiency and maximum protection when the car comes to a stop or a sudden stop.


Other Features

  • Offers the highest forward-facing capacity of any other car seat in a 5-point harness: from 20-90 lbs (up to 57″ in height).
  • The unique SuperLATCH system makes installation quick, easy and very secure.
  • This car seat sits low on the vehicle seat for easy child boarding and improved safety performance in the event of a crash.
  • Has been NCAP crash tested, the industry benchmark for verifying child seat performance in severe accident conditions.
  • 5 shoulder and 3 buckle positions for a custom, comfortable ride.
  •  Rear-facing tether capability.
  •  The angled cup holder keeps a variety of drinks upright and within easy reach for your toddler and young child.
  • Folds flat for travel and is FAA certified.
  • Cover is machine washable and can by dried in the dryer.
  • Features rubber bottom grips for no-slip installation.

Final Thoughts

The Diono Rainier Convertible Car Seat is a small investment to ensure your child’s safety and comfort. Diono is an innovative company striving to keep your child as safe and as comfortable as possible.

The Rainier will grow with your child from birth and beyond. Rear-facing, front-facing, and even booster options are available with this car safety seat.

You can’t go wrong in choosing the Diono Rainier for all your child’s travel requirements!

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