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Ships within 48 hours · Estimated delivery Jul 21 - Jul 26
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Description
britax diono Diono Radian 3RThe original 3 Across All In One convertible car seat. Up to 10 years of safe use and great value. Features: 10 Years One Car Seat from Birth to Booster (2. 3 54 kg) it's all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat! Rear Facing for Longer lovingly engineered to keep your child rear facing up to 54 kg. Fits 3 Across our famous slim fit design with zero compromises to safety, space, or comfort.
The original 3 Across All-In-One™ convertible car seat. Up to 10 years of safe use and great value.
Features:
- 10 Years One Car Seat™ - from Birth to Booster (2.3 - 54 kg) it's all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat!
- Rear-Facing for Longer - lovingly engineered to keep your child rear-facing up to 54 kg.
- Fits 3-Across - our famous slim-fit design with zero compromises to safety, space, or comfort.
-
Mechanically engineered from reinforced automotive grade high-strength steel, our unique core shell shields and protects your child.
- High-quality ComfortPlus Memory Foam, always included.
- The original and only all-in-one convertible car seat that folds for travel or compact storage. FAA approved for airline use.
- Comfort Support - head support pillow, comfort cushion and 2 XL cup holders. Additional features are exclusive to the following colorways: Black Storm, Blue Surge, Blue Razz Ice, Purple Wildberry and Pink Cotton Candy.
Product Specs
- Minimum User Weight: 2.3 kg / 5 lb
- Maximum User Weight: 54 kg / 120 lb
- Minimum User Weight - Rear Facing: 2.3 kg / 5 lb
- Maximum User Weight - Rear Facing: 22.7 kg / 50 lb
- Maximum User Weight - Rear Facing LATCH: 15.8 kg / 35 lb
- Minimum User Weight - Forward Facing: 10 kg / 22 lb
- Maximum User Weight - Forward Facing: 29.5 kg / 65 lb
- Maximum User Weight - Forward Facing LATCH: 18 kg / 40 lb
- Minimum User Weight - Booster: 18 kg / 40 lb
- Maximum User Weight - Booster: 54 kg / 120 lb
- Maximum User Height: 145 cm / 57.1 in
- Number of Head Support Positions: 12
- Product Height: 72.4 cm / 28.5 in
- Product Width: 43.2 cm / 17 in
- Product Depth: 40.6 cm / 16 in
- Seat Weight: 10.44 kg / 23 lb (Black Jet, Gray Slate, Blue Sky, Pink Blossom, Red Cherry)
- Seat Weight: 10.89 kg / 24 lb (Black Storm, Blue Surge, Blue Razz Ice, Purple Wildberry, Pink Cotton Candy)
Care & Maintenance
Covers: Machine wash cold, line dry. Shell and Components: Spot clean
Warranty Information
12 months standard warranty
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Would repurchase
Size: 8, Color: Beige
Perfect for a communion. Would absolutely recommend!
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Perfect
Size: 7, Color: Light Blue
Love it . Good quality . Value for money . Perfect color . R sizing
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Calidad en Tela y presentación.
Size: 10, Color: Beige
El Traje divino, tal como la imagen. Solo le quedó un tris grande a mi hijo y listo.
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Reviewed in the United States on April 20, 2026
★★★★★ 4
⭐️⭐️⭐️⭐️⭐️ Perfect for My Suit-Loving 9-Year-Old 🤍👔✨
My 9-year-old is obsessed with suits, and this one was a total win! 😍 The 3-piece set (blazer, vest, and pants) makes him feel so grown-up and confident. The linen material is lightweight and breathable, which is perfect for warm weather ☀️ — and it doesn’t wrinkle easily, which I appreciate as a parent 🙌.
He loves that he can wear it different ways — full suit, just vest and pants, or blazer and pants. 👌 The fit looks sharp, and the adjustable waist is super helpful.
Perfect for weddings, school events, church, or any time he wants to dress to impress. 💙 Definitely a favorite in our house! 🎉
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Reviewed in the United States on February 28, 2026
★★★★★ 5
Adorable special occasion suit for boys
Size: 5, Color: Light Blue, Size: 5, Color: Light Blue
I ordered this 3-piece suit for my son and even though it’s currently a little too big for him, I couldn’t resist keeping it because it’s absolutely adorable! The quality really impressed me right out of the package. The fabric feels lightweight and breathable, which will be perfect for warmer weather, and it has a nice polished look without feeling stiff.
The set comes with a blazer, vest, and pants, and each piece is very well made. I love the little details like the lapel on the jacket, the adjustable strap on the vest, and the adjustable waist on the pants, which will definitely help as he grows. It looks like a much more expensive suit than it actually is.
Even though my son will have to grow into it, I’m already excited for him to wear it. I’m thinking it will be perfect for Easter next year or any special occasion. It’s such a cute outfit, and I love that the pieces can be mixed and matched for different looks. Overall, I’m really happy with this purchase and can’t wait to see him wearing it! The blue color goes well for any occasion and I may have to order my husband a suit in matching shade of blue so they can be twins.
The size looks accurate for boys 5T. I took a picture to show the pants next to a pair of unwashed Oshkosh B’Gosh brand straight leg 5T boys denim jeans.
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Reviewed in the United States on March 11, 2026