10 Best High Back Booster Seats 2025 in the UK

The Graco Junior Maxi i-Size R129 is a solid choice for parents looking for a high-back booster seat that can grow with their child from about 3.5 to 12 years old (100-150 cm height). It offers a 10-position adjustable headrest, which helps maintain proper fit and comfort as your child grows. The seat includes soft cushioning and retractable cupholders, adding convenience and comfort for longer rides. Its open-loop belt guides help ensure the car’s seat belt fits correctly, improving safety. Weighing just 3.5 kg, it’s relatively lightweight, making it easier to move between cars if needed. Installation is done using the vehicle’s seat belt, which is common but requires care to ensure a tight and secure fit.

The booster meets the R129 i-Size safety standard and is forward-facing only, supporting children up to 36 kg, which covers most kids in the recommended age and height range. It does not convert into other types of seats, so it’s a dedicated high-back booster without extra convertibility options. Many parents appreciate its comfort and simple design, and it is well-regarded among car seats for babies and children. For families prioritizing ease of use, long usage period, adjustability, and comfort, this seat is a practical and reliable option.

The Maxi-Cosi Tanza i-Size high-back booster seat is designed to grow with your child from ages 3.5 to 12, accommodating heights from 100 to 150 cm. This seat emphasizes safety with its G-CELL Side Impact Protection, which helps distribute impact forces away from vital areas like the head and neck. It adheres to the i-Size safety standards, ensuring high-level protection. The seat is forward-facing and uses ISOFIX attachments for secure and easy installation, though it also allows for seat belt installation, providing flexibility.

Comfort is a key feature, highlighted by the seat's padded and elevated design, giving children a better view and comfortable ride. With 10 adjustable headrest positions, it can be tailored to the child's growth, which is a strong point for prolonged use. The seat's eco-friendly fabrics, made from recycled materials, are both sustainable and safe for children's skin, adding an eco-conscious appeal.

Ease of portability is another strength, thanks to its compact, foldable design, weighing just 5.32 kg. This makes it practical for parents who need to move the seat between cars or store it when not in use. However, at 6.75 kg, it might be slightly heavier than some might expect, which could be a consideration for frequent travel.

Despite these advantages, some potential drawbacks include its forward-facing only orientation, which might not appeal to those preferring rear-facing options for younger children. Additionally, while it has a high safety ranking and positive customer feedback, it is crucial to ensure the seat fits well with your vehicle’s seats and belt systems.

To conclude, the Maxi-Cosi Tanza i-Size booster seat is an excellent choice for those prioritizing safety, comfort, and environmental friendliness, ideal for families looking for a long-term, versatile seating solution.

The Cybex Silver Solution X-Fix high-back booster seat is designed for children aged approximately 3 to 12 years, supporting weights from 15 to 36 kg. One of its standout features is its built-in side impact protection system, which enhances safety in case of a collision. The patented reclining headrest is a thoughtful addition, offering extra comfort and preventing the child's head from falling forward during naps. For parents, the 11-position adjustable headrest ensures the seat can grow with the child, providing a custom fit over the years.

This booster seat can be used in vehicles with or without ISOFIX, adding versatility to its installation options. The ISOFIX Connect system offers additional stability when available, but the seat can still be securely installed using a standard seat belt, which is convenient for older cars. Weighing 7 kg, it's relatively lightweight for its category, making it easier to switch between vehicles if needed.

Comfort is well-considered with a comfortable seat cushion, and the removable, machine-washable cover simplifies cleaning. However, some users might find the forward-facing orientation limiting if they prefer a rear-facing option for younger children. In terms of style, the Cobblestone color is neutral and should complement most car interiors. Coupled with a high customer rating of 4.7 out of 5 stars from over 22,000 reviews, it's clear that many parents trust and appreciate this product.

While the Cybex Silver Solution X-Fix offers great safety and comfort features, those looking for a booster seat that converts to other forms (like a harness seat) might need to look elsewhere. It's an excellent choice for families prioritizing safety, ease of use, and longevity in their booster seat, making it a solid option for everyday travel and longer journeys.