176 4.56
Price: $314.99

The diono rainier all-in-one is the ultimate in car seat safety.

Free Shipping!

Choose a Color

Black Plum
Black Mist
Black Forest
Black Plaid

Product Details

Ultimate safety. Space-saving design.

Get top-tier safety and streamlined design with our rainier convertible car seat. The full steel frame, extra-deep aluminum reinforced sides, and energy absorbing foam deliver unmatched protection for your little one. The rainier accommodates children weighing 5-120 pounds. It could be the only car seat you’ll ever need.

The rainier’s superior safety comes in a sleek design that allows extra room for passengers.

Heavy is good

Our convertible car seats are made from steel for safety you can feel. The fully integrated steel frame is wrapped in thick engineered plastic to withstand severe crash forces. Deep, aluminum reinforced sidewalls provide excellent side impact protection, while energy absorbing EPS foam surrounds your child for ultimate safety. Diono car seats are definitely worth the weight.

Extended rear-facing

The rainier keeps children comfortably rear-facing from 5-50 pounds for the safest possible position. Body support cushions are included to keep newborns and infants comfortable and positioned properly.

Room to grow

Accommodates forward-facing children up to 65 pounds in a 5-point harness and converts to booster mode for kids 50-120 pounds. The aluminum reinforced, adjustable head rest and extra-deep sidewalls provide the ultimate side impact protection.

rainier Product Video

Key Features

  • NEW! Premium, plush interlock knit fabric

  • Full steel frame for unmatched safety

  • 12-position aluminum reinforced adjustable headrest

  • Extra-deep sidewalls lined with energy absorbing EPS foam for superior side impact protection

  • Comfortably seats rear-facing children from 5-50 pounds

  • Forward-facing capacity in a 5-point harness: from 20-65 pounds and up to 57″ in height

  • Converts to a booster for children from 50 pounds up to 120 pounds, and up to 57″ tall – proper fit in booster mode

  • Safe Stop® energy absorbing harness

  • Unique SuperLATCH™ system makes installation easy

  • Sleek design allows extra room for other passengers while providing spacious interior for child

  • Infant body support cushions and memory foam add comfort

  • Expandable sides and long seat bottom offer proper leg support

  • 5 shoulder and 3 buckle positions adjust for a comfortable ride

  • Rear-facing tether capability

  • Angled cup holder keeps drinks upright and within easy reach

  • Folds flat for travel and is FAA certified

  • Cover is machine washable

  • Rubber bottom grips for no-slip installation

  • 10 year life from the date of purchase



“My husband and I ordered this car seat for our 4-year-old son, and we love it. I knew I wanted something that went above and beyond all safety regulations, and I really feel Diono has done that. It's easy to set up and install.... Thank you, Diono, for making a great product that I can feel safe putting my kids into.”

4 reasons why the diono rainier all-in-one is the ultimate in car seat safety

  • experience: When you’re looking for your child to experience the joy of riding in a car seat that is lovingly engineered, look no further than a diono rainier.
  • comfort: Travel ready with comfort in mind, your child will relax as you head to the market or take a long journey to grandma’s home for the holidays.
  • lifestyle: The magic of the rainier happens under the premium fashion covers. The deep side walls and reinforced head support give you the peace of mind to overprotect your child in all the right ways.
  • journey: Life can be hectic and expensive when the joy of children arrive in our lives. The diono rainier offers multiple modes of use with a long range life span to take your child on their journey of childhood.

4 ♥s for diono rainier:

  • experience: Lovingly engineered to joyfully protect your child.
  • comfort: Built in Comfort for the longest or shortest journeys.
  • lifestyle: Overprotects your child in all the right ways, it's all under the cover.
  • journey: Multiple uses for your growing child with a 10 year life span.