Britax Advansafix PRO i-Size Car Seat

Britax Advansafix PRO i-Size Car Seat

Give your child long-lasting comfort and advanced protection with the Britax Advansafix PRO, a forward-facing multi-stage car seat designed to grow with your child from approximately 15 months to 12 years (76–150cm).

Approved to the latest UN R129 i-Size safety standard, the Advansafix PRO transitions from a secure 5-point harness car seat to a highback booster, providing one dependable seat throughout your child's early years.

Advanced Britax safety technologies including SICT side-impact protection, XP-PAD and SecureGuard provide additional protection, while ISOFIX connectors, Top Tether, EasyRecline and the adjustable V-shaped headrest make everyday journeys secure and comfortable.

Choose Your Style & Colour

The Britax Advansafix PRO is available in a choice of finishes and colours.

Classic: Soft, high-quality fabrics designed for lasting everyday comfort.

Style: Premium fine-mesh fabrics provide enhanced air circulation for greater comfort.

Select your preferred style and colour from the dropdown menu.

Key Features

Grows From Toddler to 12 Years

One car seat designed to provide years of use.

• Suitable from 76–150cm
• Approximately 15 months to 12 years
• Forward-facing
• 5-point harness up to 105cm / maximum 22kg
• Converts into a highback booster
• Adjustable headrest grows with your child

Advanced Side Impact Protection – SICT

Side Impact Cushion Technology (SICT) provides additional protection during a side collision.

• Reduces side-impact forces by up to 40%*
• Directs forces away from your child
• Positioned on the side of the car seat closest to the vehicle door

XP-PAD Neck & Chest Protection

The shock-absorbing XP-PAD provides additional protection around your child's neck and chest when using the vehicle seat belt.

During a frontal impact, it can reduce abrupt forward head movement by up to 30%*, while also providing a comfortable padded edge between your child and the seat belt.

SecureGuard Protection

When the Advansafix PRO is used as a highback booster, SecureGuard provides an additional fourth contact point for the vehicle's lap belt.

This helps guide the belt into the correct position across your child's pelvis for secure and comfortable travel.

Extra-Safe 5-Point Harness

For younger children, the integrated 5-point harness helps distribute impact forces across five points and into the protective seat shell.

Features include:

• Secure 5-point harness
• Use up to 105cm / maximum 22kg
• Soft performance chest pads
• Removable and washable chest pads

Flip&Grow – Easy Booster Conversion

As your child grows, Flip&Grow makes switching from the integrated 5-point harness to your vehicle's 3-point seat belt quick and straightforward.

There's no need to remove parts permanently or purchase another seat – simply convert the Advansafix PRO into highback booster mode when your child is ready.

EasyRecline Comfort

Long journey or nap time?

The EasyRecline function allows you to select a comfortable reclined position for your child, providing additional comfort throughout every stage of use.

Head-to-Hip Protection

The highback seat shell surrounds your child to provide support and protection from head to hip.

Features include:

• Deep protective side wings
• Height-adjustable V-shaped headrest
• Padded head and neck support
• Integrated vehicle seat belt guides

ISOFIX & Top Tether Installation

For younger children, the Advansafix PRO uses ISOFIX connectors and Top Tether for a secure installation.

ISOFIX indicators help confirm when the connectors are correctly installed, while the Top Tether helps minimise forward movement and rotation during a collision.

Installation Options

76–105cm

• Forward-facing
• ISOFIX installation
• Top Tether
• Integrated 5-point harness

100–150cm

Choose between:

• Vehicle 3-point seat belt + ISOFIX
• Vehicle 3-point seat belt installation

Removable & Washable Cover

Family journeys can get messy, so the Advansafix PRO features an easily removable, machine-washable seat cover.

The harness chest pads can also be removed and washed when required.

Specifications

• Brand: Britax
• Model: Advansafix PRO
• Approval: UN R129 i-Size
• Suitable Height: 76–150cm
• Age Guide: Approximately 15 months – 12 years
• Orientation: Forward-facing
• Weight: 10kg

Dimensions

• Height: 60–83cm
• Width: 44cm
• Depth: 48cm

What's Included

• 1 x Britax Advansafix PRO i-Size Car Seat (your selected colour)
• 1 x Cushion insert*

Cushion insert is not available with CLASSIC versions.

Why Choose the Britax Advansafix PRO?

The Britax Advansafix PRO provides a long-lasting car seat solution from toddlerhood through to approximately 12 years. Its combination of an extended-use 5-point harness, highback booster functionality and advanced SICT, XP-PAD and SecureGuard safety technologies means you can adapt the seat as your child grows without compromising on comfort or protection.

With ISOFIX connectivity, Top Tether, EasyRecline and Flip&Grow functionality, it's designed to make secure everyday family travel straightforward for years to come.

Performance figures are based on Britax Römer internal tests and simulations.