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Graco Junior Maxi™ i‑Size R129 Highback Booster

Graco Junior Maxi™ i‑Size R129 Highback Booster
Graco Junior Maxi™ i‑Size R129 Highback Booster - Image 2
Graco Junior Maxi™ i‑Size R129 Highback Booster - Image 3
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Graco Junior Maxi™ i‑Size R129 Highback Booster

The Junior Maxi™ Booster Car Seat by Graco is designed to keep growing big kids safe and comfy. This car seat meets the EU’s latest R129 safety standards and is i-Size certified, which means that it will correctly fit in any i-Size approved vehicle. Equipped with enhanced side impact protection, this booster seat provides an additional layer of security for your big kid.

You can effortlessly adjust this highback booster’s 10-position headrest to ensure your growing child always has proper head and neck support. The premium padded seat offers extra comfort and the two retractable cup holders keep drinks within reach. Weighing in at only 3.4kg, it is easy to install and move between vehicles, making it ideal for families on the go. To minimise the risk of using the seat belt incorrectly, the open-loop belt guides keep the seat belt correctly positioned across your growing child’s body.

£36.70

The Junior Maxi™ Booster Car Seat by Graco is designed to keep growing big kids safe and comfy. This car seat meets the EU’s latest R129 safety standards and is i-Size certified, which means that it will correctly fit in any i-Size approved vehicle. Equipped with enhanced side impact protection, this booster seat provides an additional layer of security for your big kid.

You can effortlessly adjust this highback booster’s 10-position headrest to ensure your growing child always has proper head and neck support. The premium padded seat offers extra comfort and the two retractable cup holders keep drinks within reach. Weighing in at only 3.4kg, it is easy to install and move between vehicles, making it ideal for families on the go. To minimise the risk of using the seat belt incorrectly, the open-loop belt guides keep the seat belt correctly positioned across your growing child’s body.

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Description

Graco Junior Maxi™ i‑Size R129 – Safe, Adaptable, and Effortlessly Mobile

As your child grows, ensuring their safety and comfort while traveling is a top priority. The Graco Junior Maxi™ i‑Size R129 Highback Booster Car Seat delivers peace of mind through top-tier safety certifications, thoughtful features, and convenience designed for modern families.

Unmatched Safety & Compliance

This booster is i‑Size and ECE R129 certified, setting the gold standard for child car seat safety. These certifications ensure rigorous side-impact and frontal testing, tailoring the seat fit precisely by height (100–150 cm), reducing misinstallation risks, and enhancing overall protection

Growth-Ready Comfort & Fit

Equipped with a 10-position adjustable headrest, the seat grows with your child while keeping the head and neck properly supported  The premium padded seat offers the cushioned support needed for longer journeys or daily school runs

Lightweight & Convenient Mobility

At just 3.4 kg, this booster is lightweight enough to transfer between vehicles—perfect for multi-car households or travel Its compact dimensions (39 cm length × 45.6 cm width × 60.5–81.5 cm height) ensure versatile fit in diverse vehicles

Practical Design Features

  • Open‑loop belt guides: Ensure the seatbelt sits correctly across a child’s shoulder and lap for optimal safety

  • Two retractable cup holders: Conveniently keep drinks or snacks within reach—ideal for long drives or active kids

  • Machine-washable cover: Easily removable fabric makes cleaning spills or stains simple and efficient

Specifications at a Glance

FeatureDetails
Certificationi‑Size / R129 certified – side impact tested
Age/Height Range3.5–12 years; 100–150 cm
Headrest10-position adjustable for growth
WeightApprox. 3.4 kg
Dimensions (L × W × H)39 cm × 45.6 cm × 60.5–81.5 cm
Belt GuidesOpen-loop for proper seatbelt positioning
Cup Holders2 retractable
Cover MaintenanceMachine-washable (delicate, cold water)
StyleForward-facing highback booster
Ideal ForFamilies needing a safe, lightweight booster for growing children

Pros & Cons

Pros:

  • Lightweight and easy to transfer or install

  • Affordable price point with good features for the value

  • Easy to clean, growing-friendly, safe

Cons:

  • Some reports of minimal padding—may feel firm for sleeping kids

  • Cup holders may be small—better for smaller cups or snacks

User Impressions

Rated 4.7/5 (based on nearly 14,000 reviews), families appreciate the seat’s ease of installation, lightweight nature, smooth adjusting headrest, and cup holder convenienceA reviewer shared: “Easy to fit… perfect next-stage car seat… adjustable height. Bonus with the cup holders.”

Final Thoughts

The Graco Junior Maxi™ i‑Size R129 Booster is a smart pick for parents seeking a reliable, safe, and adaptable booster seat. Its advanced safety standards, adjustable comfort, lightweight portability, and user-friendly design make it a solid long-term choice from early school years through pre-teens.

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