The Diono Radian 3RXT Special Edition is the original slim-fit 3 across all-in-one convertible car seat to protect your child from baby to booster seat.
Lovingly finished with exclusive contemporary fabrics, the car safety seat is engineered with a steel-reinforced frame for 10 years of use. The convertible car seat provides safe and comfortable baby positioning thanks to the 2-in-1 infant liner with integrated newborn baby travel high wedge which helps reduce head slump to keep airways open. As your baby grows, simply remove the wedge to allow the liner to give extra comfort and support. Designed and engineered with complete rear-facing protection, this car seat is suitable for up to 50 pounds. Transition from rear-facing to forward-facing using the adjustable, 12-position headrest and rest easy knowing the SuperLATCH system is super easy to install. The slim-fit design will fit 3 across most vehicles without compromising child safety or passenger comfort and the steel-reinforced cup holder stores essential road trip drinks and snacks. The Radian is also aircraft certified (FAA approved), so you can take safety with you wherever you go.
Have the peace of mind you deserve when you travel with the Diono Radian 3RXT Car Seat.
- Car seat converts from infant to booster seat, rear, and forward-facing modes to adapts as your child grows for 10 years of use
- High-quality polyester is used to create exclusive fabrics with timeless shapes and earthy tones
- Designed for safe rear-facing travel from 5 to 50 pounds, forward-facing with a 5-point harness up to 65 pounds, and high-back booster mode up to 120 pounds
- One-handed easy-adjust, 12-position headrest for a comfortable fit
- Ensures durability thanks to the reinforced steel frame made from automotive-grade high-strength steel
- Equipped with a high wedge for extra protection; Built with slim fit convertible design for a 3-across option in most vehicles
- Weight capacity: 5 to 120 pounds
- Material: Steel frame, high-density plastic, EPP, EPS
- Color: Gray Oyster
- Folded dimensions (D x W x H): 7.1 x 17 x 28.5 inches
- Overall dimensions (D x W x H): 16 x 17 x 28.5 inches
- Weight: 28.1 pounds
- Manufacturer warranty: 1-year warranty
Questions? We’ve Got Answers.
Helpful answers about product features, setup, and more
What material is the car seat made of?
The car seat is constructed from steel. This material choice supports everyday use while maintaining the structural integrity needed for the product’s intended applications.
How big is the car seat?
The car seat measures 7.1 x 17 x 28.5 inches (length x width x height). Use these measurements to confirm the product fits your intended setup before ordering.
Does the car seat come with a warranty?
Yes. The car seat is backed by 1-year manufacturer warranty. Coverage details and claim procedures are provided by the manufacturer; retain your order receipt as proof of purchase if you ever need to file a claim.
What is the best way to maintain the car seat?
Wipe with a damp cloth and dry thoroughly to prevent rust. For powder-coated finishes, avoid abrasive cleaners that may scratch the coating. Regular light cleaning extends the lifespan of the car seat and keeps it looking and performing well over time.
What finish does the car seat come in?
This car seat comes in gray. The color provides a neutral finish that coordinates with a wide range of décor styles.
Who makes the car seat?
The car seat is made by Diono Radian. Diono Radian produces this item as part of its lineup, and product details such as specifications, included accessories, and warranty terms are set by the brand.


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