Nuna ARRA Flex i-Size Infant Car Seat

Nuna ARRA Flex i-Size R129 Infant Car Seat

For those busy days and long journeys, the Nuna ARRA Flex infant car seat provides a smooth transition from crib to carrier, offering unprecedented flexibility for modern families. Its revolutionary three recline positions, including a remarkably relaxed 157° recline position, allow baby to lie comfortably whether installed using one of the many flexible options in your vehicle, secured on an aeroplane, or attached to a pushchair.

The lightweight ARRA Flex is i-Size approved and offers innovative safety features along with ergonomic advantages that provide you and baby with the ultimate freedom for every journey. Now available in stunning new 2026 colours - Caviar, Chateau, Chestnut, and Pistachio—the ARRA Flex combines award-winning design with exceptional versatility.

Revolutionary 157° Recline Position

What truly sets the ARRA Flex apart from traditional infant carriers is its exceptional 157° recline angle—the most relaxed recline available in an infant car seat. This near-flat position keeps baby's head, spine, and hips in an ideal position for healthy development, providing significant benefits for your little one's wellbeing during travel.

Most importantly, this innovative recline makes the ARRA Flex exempt from the standard 2-hour limit usage recommendation that applies to traditional semi-reclined infant carriers. This means you can travel with complete confidence on longer journeys, knowing your baby is positioned optimally for breathing, spinal development, and comfort throughout extended trips.

The 157° recline is available whether the seat is installed in your vehicle using the seat belt, clicked onto a compatible base, attached to your pushchair as part of a travel system, or even secured on an aeroplane. This versatility makes the ARRA Flex the ideal choice for families who frequently take longer journeys or simply want the peace of mind that their baby is always in the healthiest possible position.

Three Flexible Recline Positions

Beyond the revolutionary 157° position, the ARRA Flex offers three recline positions that adapt to your baby's needs and different travel scenarios. You can easily adjust between positions whether the seat is installed in the car or attached to a pushchair, giving you remarkable flexibility throughout your day.

The more upright positions work beautifully for alert babies who want to see the world around them during shorter journeys, whilst the 157° recline provides the optimal position for sleeping, extended travel, or simply ensuring your newborn is positioned as flat as possible for healthy development. This adjustability means one car seat adapts to multiple situations rather than forcing your baby into a single, fixed position.

Multiple Installation Options for Ultimate Flexibility

The ARRA Flex offers exceptional installation versatility, working with multiple methods to suit your family's needs:

Vehicle Seat Belt Installation: The ARRA Flex installs securely using your vehicle's seat belt without needing a base—perfect for families who switch between multiple vehicles, use taxis or rideshares, or travel with grandparents. The belt routing is clearly marked and straightforward, making installations confident and secure.

NEXT System Base Compatibility: The ARRA Flex is fully compatible with Nuna's modular NEXT system bases—both the BASE next and the advanced BASE curv (sold separately). This means you can enjoy the convenience of click-in-and-go installations at home whilst maintaining the flexibility of belt installation when travelling.

Aeroplane Certified: The ARRA Flex is TÜV-certified for in-flight safety when secured with an aircraft lap belt. The 157° recline design means your baby stays comfortable during flights, and the lightweight 3.8kg construction makes carrying through airports manageable even with all your other travel essentials.

Travel System Ready: Using post adaptors, the ARRA Flex connects to compatible pushchairs, creating a seamless travel system that protects sleeping babies from disturbance as you transition from car to pavement.

NEXT System Compatibility

The ARRA Flex is part of Nuna's innovative NEXT system—a modular approach offering multiple car seat solutions for the first four years, all using the same rotating ISOFIX base. If you choose to add a BASE next or BASE curv later (or already have one for another NEXT system product), the ARRA Flex clicks on and off with ease, providing the convenience of base installation when you want it whilst maintaining the flexibility of baseless installation when you need it.

This modularity means you can start with just the ARRA Flex and add a base later, or use the same base you already have for the Cari Next, Pipa Next, or Todl Next. It's a smart, cost-effective approach that grows with your family's changing needs.

Outstanding Safety Features

Safety is paramount with the ARRA Flex, which is fully i-Size certified and meets stringent ECE R129/03 safety standards including mandatory side impact testing. The car seat incorporates multiple layers of protection to safeguard your precious cargo:

EPP Energy-Absorbing Foam: The shell features integrated EPP (expanded polypropylene) foam that takes side impact security to the next level, absorbing and dissipating impact energy away from your baby during lateral collisions.

Tailor Tech Memory Foam Headrest: Nuna's patented Tailor Tech memory foam in the headrest moulds to your baby's head shape, providing both comfort and enhanced protection. This innovative foam creates a custom fit that improves positioning and support as your baby grows.

Heavy-Duty Shell: The top-of-the-line plastic shell is engineered for exceptional strength and rigidity, keeping your little one securely in place whilst maintaining a remarkably light overall weight.

High-Strength Handle: The carry handle isn't just for convenience—it's a crucial safety feature designed to transfer a large portion of crash forces into the shell, protecting your baby's particularly sensitive head area during an impact.

Exceptionally Lightweight Design

At just 3.8kg (without insert or canopy), the ARRA Flex is one of the lightest i-Size infant car seats available. This featherlight design makes carrying your baby from car to home, through airports, or around town notably easier—particularly important during those early months when you're managing nappy bags, shopping, and everything else new parenthood brings.

The luxe leatherette carry handle provides a secure, comfortable grip that won't slip or cause discomfort even during extended carrying. Despite its lightweight construction, the ARRA Flex doesn't compromise on safety or features—it's a masterclass in intelligent engineering that prioritises both portability and protection.

No-Rethread Harness System

Parents will appreciate the ARRA Flex's clever no-rethread 3-point harness that adjusts automatically as you raise the headrest. The one-handed height-adjustable headrest offers 10 positions to accommodate growth from newborn through to approximately 24 months, and as you adjust the headrest, the harness shoulders move seamlessly along with it.

This intelligent design eliminates the frustrating process of unthreading and rethreading harness straps through different slots as your baby grows, ensuring your child always has the correct harness height for optimal safety whilst making adjustments remarkably simple.

Premium Comfort Features

Every journey is more pleasant with the ARRA Flex's comprehensive comfort features. The removable newborn insert provides customisable support for tiny babies, crafted from an environmentally friendly blend of Merino wool and TENCEL™ branded lyocell fibres. This natural material combination is super soft against delicate skin, naturally controls moisture, and provides temperature regulation to keep your baby comfortable in all seasons.

The removable full-coverage UPF 50+ canopy offers generous sun protection with a flip-out eyeshade for extra coverage and a mesh peek-a-boo window that allows you to check on your little one without disturbing them. The canopy removes completely when using the ARRA Flex on a pushchair or when you want to reduce weight for carrying.

GREENGUARD Gold Certified

The ARRA Flex has achieved prestigious GREENGUARD Gold Certification, meaning it has been thoroughly tested and certified to meet stringent volatile organic compounds and chemical emissions standards. This certification provides assurance that the car seat won't contribute to indoor air pollution in your vehicle or home, creating a healthier environment for your baby's developing respiratory, immune, and neurological systems.

Award-Winning Design Excellence

The ARRA Flex has received multiple prestigious international awards, recognising its innovative approach to infant car seat design:

• European Product Design Award – Top Design Winner 2024
• iF Design Award Winner 2025
• Red Dot Product Design Winner

These accolades reflect the ARRA Flex's exceptional blend of safety innovation, ergonomic design, and aesthetic appeal—a car seat that doesn't just perform brilliantly but looks beautiful too.

Stunning New 2026 Colours

The ARRA Flex is now available in five sophisticated new 2026 colours:

• Caviar: Classic deep black with timeless elegance
• Chateau: Refined neutral grey with contemporary sophistication
• Chestnut: Warm rich brown with natural appeal
• Pistachio: Fresh soft green with distinctive character

Each colourway features premium fabrics and finishes that complement Nuna's design aesthetic whilst being practical for daily use.

Who Is the Nuna ARRA Flex Perfect For?

The ARRA Flex is the ideal choice for:

• Families who frequently take long journeys and want to avoid the 2-hour time limit
• Parents concerned about optimal positioning for healthy spinal and hip development
• Those who regularly switch between vehicles or use taxis and rideshares
• Frequent flyers needing an aircraft-certified seat that keeps baby comfortable in-flight
• Families building a NEXT system for long-term modular flexibility
• Parents seeking the lightest possible infant carrier without compromising safety
• Anyone who values installation versatility with multiple options for different scenarios
• Eco-conscious families seeking natural materials and GREENGUARD Gold certification

Technical Specifications

Age & Weight:

• Orientation: Rear-facing only
• Child height: 40-87cm
• Child weight: Birth to 13kg (approximately 24 months)

Product Details:

• Weight: 3.8kg (without insert or canopy)
• Safety standard: ECE R129/03 (i-Size certified)
• Recline positions: 3 (including 157° near-flat position)
• Headrest positions: 10 adjustable heights
• Harness: No-rethread 3-point system
• Side Impact Protection: EPP energy-absorbing foam
• Head protection: Patented Tailor Tech memory foam
• Shell: Heavy-duty high-strength plastic
• Handle: Luxe leatherette with safety-engineered design
• Canopy: Removable UPF 50+ with flip-out eyeshade and mesh window
• Insert: Merino wool and TENCEL™ lyocell blend (removable)

Installation Options:

• Vehicle seat belt: Baseless installation
• NEXT system bases: Compatible with BASE next and BASE curv (sold separately)
• Aircraft: TÜV-certified for aeroplane use with lap belt
• Travel system: Compatible pushchairs with post adaptors

Certifications:

• i-Size certified: ECE R129/03 compliance
• GREENGUARD Gold Certified: Stringent emissions standards
• TÜV aircraft certified: In-flight safety approval
• Factory certified: ISO 14001, ISO 9001, OHSAS 18001

Awards:

• European Product Design Award – Top Design Winner 2024
• iF Design Award Winner 2025
• Red Dot Product Design Winner

Available Colours (2026):

• Caviar
• Chateau
• Chestnut
  
• Pistachio

What's Included

• Nuna ARRA Flex i-Size infant car seat
• Removable newborn insert (Merino wool and TENCEL™ blend)
• Removable UPF 50+ canopy with eyeshade
• Instruction manual including belt installation guide

Please note: Bases sold separately. The ARRA Flex can be used with vehicle seat belt installation or with optional BASE next or BASE curv.

Why Choose Little Peas for Your Nuna ARRA Flex?

At Little Peas, we're specialists in car seat safety with over 15 years of expertise. Our knowledgeable team can provide expert guidance on the ARRA Flex's innovative recline system, help you understand the benefits of the 157° position for extended travel, and demonstrate the various installation options.

We offer free UK delivery, and you're welcome to visit our Dunfermline showroom to see the ARRA Flex in person in all the stunning new 2026 colours. We can show you the recline positions, explain how the no-rethread harness works, and help you decide whether to pair it with a NEXT system base. Our friendly experts are here to answer all your questions and ensure you find the perfect car seat solution for your family.

Experience the freedom of flexible, healthy travel with the Nuna ARRA Flex—where innovative recline technology meets award-winning design, creating an infant car seat that adapts to your journey, not the other way around. Read more at nunababy.eu