SKU: 36501969473
britax romer booster seat

britax romer booster seat Britax Römer ADVANSAFIX PRO Car Seat

Sale price$19.74 Regular price$21.93
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Description

britax romer booster seat Britax Römer ADVANSAFIX PRO Car SeatBritax Rmer ADVANSAFIX PRO i Size Car Seat Group 1 2 3 Extended Use (15 Months to 12 Years) Your Child's Faithful Travel Companion for Over a Decade The Britax Rmer ADVANSAFIX PRO i Size isn't just a car seat it's your child's faithful friend for every adventure from toddlerhood to adolescence. Designed to grow with your little one, this innovative seat provides ultimate protection from 15 months right up to 12 years, eliminating the need for multiple

Britax Römer ADVANSAFIX PRO i-Size Car Seat - Group 1/2/3 Extended Use (15 Months to 12 Years)

Your Child's Faithful Travel Companion for Over a Decade

The Britax Römer ADVANSAFIX PRO i-Size isn't just a car seat - it's your child's faithful friend for every adventure from toddlerhood to adolescence. Designed to grow with your little one, this innovative seat provides ultimate protection from 15 months right up to 12 years, eliminating the need for multiple car seat purchases as your child develops.

i-Size Safety Excellence for Modern Families

Approved to the latest i-Size safety standards (UN R129), the ADVANSAFIX PRO delivers uncompromising protection that exceeds traditional safety requirements. This forward-thinking design prioritises your child's safety whilst offering exceptional versatility and comfort for the entire family.

Effortless FLIP&GROW Technology

Simply convert from a harnessed seat to a highback booster seat in a few easy steps thanks to the ingenious FLIP&GROW function. Once your child reaches 100cm (max. 105 cm / 22 kg), change the integrated 5-point harness to your car's 3-point seat belt easily, ensuring seamless transitions as they grow.

Advanced Safety Technologies

Triple Protection System

The ADVANSAFIX PRO features three advanced safety technologies working in perfect harmony:

SICT (Side Impact Cushion Technology)

Protect your little one in the event of a side collision with superior side impact protection. The Side Impact Cushion Technology (SICT) minimises the distance between the car and the car seat, reducing the force of an impact by up to 40%, directing dangerous forces away from your precious child.

XP-PAD Shock Absorption

Protect your little one's precious neck in a frontal impact with the shock-absorbing foam XP-Pad. In an accident, it reduces an abrupt forward head movement by up to 30%, preventing your child's chin from hitting their chest. The XP-PAD also provides comfortable padding to prevent seat belt irritation.

SecureGuard Frontal Protection

Adding an extra fourth contact point to secure the lap belt safely across your child's pelvis - rather than their delicate tummy - reduces abdominal forces by up to 35%, providing crucial protection during frontal impacts.

Key Features & Benefits

Extended 5-Point Harness Protection

The 5-point harness can be used right up until your little one reaches 105 cm (max. 22 kg), meaning you can rely on the ADVANSAFIX PRO to keep your little one safe for longer. This extended harness use provides superior protection compared to standard Group 1/2/3 seats.

Independent ISOFIX Installation

Install the seat more easily, since each ISOFIX connector of the ADVANSAFIX PRO is operated independently. They're fast and safe to connect, making installation straightforward even for busy parents.

Top Tether Stability

The sturdy Top Tether minimises any rocking movement of the car seat during an accident, reducing the possibility of harm to your child's head and neck, providing additional peace of mind.

EasyRecline Comfort System

Let your little one sleep comfortably throughout childhood travels with the EasyRecline function. Adjust effortlessly even when your child is in the seat, ensuring optimal comfort for naps and long journeys.

V-Shaped Protective Headrest

The V-shaped headrest is specially designed to limit the movement of your child's head, protecting their neck if the worst happens, whilst giving them space as they grow. The headrest and harness adjust simultaneously for perfect positioning.

Soft Performance Chest Pads

Your child's movements are reduced in a collision thanks to the soft performance chest pads. The pads bring even more comfort to the secure 5-point harness, and for those inevitable messy moments, they can even be removed for washing without having to detach the straps.

Technical Specifications

Specification Details
Age Range 15 months to 12 years
Height Range 76cm - 150cm
Weight Limits Up to 22kg (harness mode), 36kg (booster mode)
Safety Standard i-Size (UN R129) approved
Installation Methods ISOFIX + Top Tether (76-105cm), Belt + ISOFIX (100-150cm)
Seat Weight 10kg
Dimensions (H x W x D) 60-83 x 44 x 48 cm
Seat Width 44cm (suitable for 3-across installations)
Recline Positions Multiple positions with EasyRecline
Cover Care Machine washable, quick-remove design

Installation Options & Compatibility

Phase 1: Harness Mode (76-105cm)

  • ISOFIX + Top Tether installation
  • ISOFIX is a standard system of connection points featured in almost all cars. This establishes a secure and firm connection between the child's car seat and the car
  • Suitable from approximately 15 months to 4 years

Phase 2: Booster Mode (100-150cm)

  • Option 1: Belt + ISOFIX attachment (recommended)
  • Option 2: 3-point seat belt only (cars without ISOFIX)
  • Suitable from approximately 4 years to 12 years

Why Choose the ADVANSAFIX PRO?

Exceptional Value for Money

It's a great price when you think how long it will actually last you, meaning you could only need two car seats during their childhood. This represents outstanding long-term value compared to purchasing multiple seats.

Space-Efficient Design

The Britax Römer ADVANSAFIX i-Size is quite a slim seat measuring 44cm in width. This is great for people trying to fit three car seats along the back seat for their children.

Superior European Engineering

We are big fans of Britax Römer and the great child car seats that they design and make, all in-house in Germany. Every ADVANSAFIX PRO benefits from decades of German engineering excellence and safety innovation.

Extended Legal Protection

The car seat can be used for longer as a high back booster, up to 150cm, even though the law is up to 135cm. This extension is great and offers protection for the child longer if you choose.

Care & Maintenance

Quick-Remove Cover System

Machine washable cover easily detaches from the car seat without removing the harness, so you can get back on the road quicker. This innovative design saves time and reduces hassle during cleaning.

Care Instructions

  • Remove cover using simple quick-release mechanism
  • Machine wash at 30°C with mild detergent
  • Air dry - do not tumble dry
  • Chest pads can be removed separately for washing
  • Harness remains attached for easy reassembly

Expert Safety Recommendations

Forward-Facing from 15 Months Minimum

We are pleased that the newest version of the ADVANSAFIX, as a forward facing only seat, is suitable from 15 months as a minimum, as rear facing is much safer for younger children. The i-Size regulation ensures optimal safety timing for the transition to forward-facing travel.

Professional Installation Verification

Always verify compatibility with your specific vehicle and consider professional installation checking to ensure optimal safety performance.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 36501969473

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Rafael Mota
Charlottesville, US
★★★★★ 5
A Game-Changer for Comfort
Size: Medium, Color: Black, Number of Items: 6
I recently upgraded my workout gear with the Under Armour Training Cotton Quarter Socks, and I must say, these socks have revolutionized my exercise experience. Comfortable, durable, and stylish, they truly stand out in the crowded world of athletic socks. First and foremost, the comfort level of these socks is unparalleled. The blend of cotton and synthetic materials provides a soft and plush feel against my feet, making every step a pleasure. The quarter length strikes the perfect balance, offering ample coverage without being too restrictive or too short. It's like walking on clouds, even during the most intense workouts. One of the standout features is the moisture-wicking technology. I've worn these socks during high-intensity cardio sessions, and they have consistently kept my feet dry and comfortable. The breathability is remarkable, preventing that uncomfortable feeling of sweaty feet that often accompanies strenuous workouts. No more distractions – just focus on pushing through your fitness routine. Durability is another strong suit of these socks. After numerous washes, they maintain their shape and elasticity, showing no signs of wear and tear. The reinforced heel and toe areas provide extra support, ensuring longevity and preventing the dreaded sock holes that often plague other brands. The sleek design of the Under Armour Training Cotton Quarter Socks adds a touch of style to my workout attire. The subtle logo and choice of colors make them versatile enough to pair with any athletic shoes. Whether you're hitting the gym, going for a run, or simply running errands, these socks seamlessly blend fashion with function. In terms of sizing, I found that they fit true to size. The elastic band around the arch provides a snug yet comfortable fit, ensuring that the socks stay in place throughout any activity. While the price point may be slightly higher than some other options on the market, the quality and performance of the Under Armour Training Cotton Quarter Socks more than justify the investment. When it comes to comfort, durability, and style, these socks have become an indispensable part of my workout wardrobe.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 3, 2024
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Shayla Garrison
Lake Worth, US
★★★★★ 5
good medium rise sock
Size: Large, Color: Black (6-pairs), Number of Items: 6
love a good under armour sock!
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Reviewed in the United States on June 2, 2026
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Carol Foshag
Louisville, US
★★★★★ 5
Well made
Size: Large, Color: Black (6-pairs), Number of Items: 6
These are the only socks that my 12 year old Grandson will wear. He's very picky. LOL
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Reviewed in the United States on March 2, 2026
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Kiersten
Charlottesville, US
★★★★★ 5
Comfort and durability
Size: Large, Color: White (6-pairs), Number of Items: 6
Socks work really good. I have very rough and dry feet that tear up my bed sheets. They hold up to my destructive feet. They are soft and comfy!
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Reviewed in the United States on December 14, 2025
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LC
Phoenix, US
★★★★★ 5
LOVE THEM!!
Size: Small, Color: (001) Black / Black / Castlerock
LOVE! These socks are so comfortable! I wear a 5 in women's and a 3 in big kid shoes. The small fit me perfectly. I see where some say they run small but I can't say that was an issue for me. They are "snug" but thats what you want with a no show sock. I feel they have support vs the ones i used to buy at Walmart. They are very soft! I am actually buying more today and throwing my other ones in the trash!
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Reviewed in the United States on February 18, 2026

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