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Baby convertible car seats

Britax Safe-n-Sound B-First ifix+ Convertible Car Seat

Britax Safe-n-Sound B-First ifix+ Convertible Car Seat

Britax Safe-n-Sound

(5)

based on 15 reviews

Britax Safe-n-Sound B-First ifix+ Grey Opal – 45 Right

Britax Safe-n-Sound B-First ifix+ Grey Opal – 45 Right

Britax Safe-n-Sound B-First ifix+ Grey Opal – 45 Right

Britax Safe-n-Sound B-First ifix+ Black Opal – 45 Right

Britax Safe-n-Sound B-First ifix+ Grey Opal – Front Isofix

Britax Safe-n-Sound B-First ifix+ Grey Opal – RF 45 Right

Britax Safe-n-Sound B-First ifix+ Grey Opal – Front HR

Buy it from Baby Bunting

$749.00

Buy now

B-First Ifix is our #1 isofix car seat, featuring Advanced SICT, a protective shell, and a rearward facing level indicator to help with installation. Britax’s Next Generation range offers parents a selection of child seats, that deliver on aesthetically beautiful design, safety, comfort, and innovation. As safety leaders, we are here for all your firsts, seconds, and growing family needs.

B-First Ifix has been designed with a beautiful closed protective shell featuring ISOFIX compatibility and Advanced Side Impact Cushion Technology (SICT) protection. ISOFLEX connectors allow for installation in vehicles with ISOFIX anchorages.

With your child’s wellness front of mind, the +SERIES has body conforming properties to relieve pressure points for active comfort. Our award-winning Thermo5® High-Performance Fabric with memory foam, delivers world-class safety protection and luxury comfort where it matters most.

Community reactions

comfy seateasy to installgreat fit in the careasy to cleanwould definitely recommendnice cushioning

Member reviews

Average rating

(5)

based on 15 reviews

Read our review tips

Ratings Snapshot

5 14

4 1

3 0

2 0

1 0

Read our review tips

sally.shu.zhuran

March 17, 2026

sally.shu.zhuran

We are happy with the product

We are quite happy with the car seat, and my daughter loves riding in it. I believe the product is suitable for children up to four years old, and we are planning to purchase one for older… Read more

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Eric Huang

July 21, 2025

Eric Huang

Both thumbs up

Highly recommend this car seat. Its super easy to install and clean. With its adjust setting too. Also my baby loves sitting in this seat. Just a note this seat can be abit big on the sides.… Read more

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Caitlin C

July 14, 2025

Caitlin C

Best car seat!!

Highly recommend the Britax B-First!! Amazing car seat!! Easy to use, easy to adjust, easy to install (initially had it done professionally, but have since done it ourselves confidently). Currently have 2 B-Firsts, one for a rear… Read more

Buy it from Baby Bunting

$749.00

Buy now

Britax Safe-n-Sound Advertisement

Britax Safe-n-Sound Advertisement

Specifications

Colours: Black Opal, Grey Opal
Suitability: From birth to 4 years (approx.)
- Rearward Facing: From birth to 2- 3 years (approx.)
- Forward Facing: From 12mths to 4 years (approx.)
Dimensions (H x D x W):
- Forward Facing: 650 x 538 x 467mm
- Reaward Facing: 508 x 728 x 467mm

Key features

THERMO5® with Memory Foam Comfort: Body conforming memory foam properties combined with Thermo5® High Performance fabric gives your child active comfort where it matters most.
ISOFIX Compatible with ISOFLEX® Latch: ISOFLEX latch connectors allow for installation to vehicles with ISOFIX low anchorages. ISOFIX installation is an alternative method to traditional seatbelt installation.
Advanced Side Impact Cushion Technology (SICT): Advanced SICT is a deployable safety innovation with crumple zone technology. Located on the Headrest and Torso, the unique design combines advanced safety and freedom of space.
Rearward Facing Level Indicator: Visual level indicator designed to aid correct rearward installation angles. Full or partially visible, the level indicator offers you an optimal range during installation.
Protective Shell: The enclosed shell design provides enhanced shielding to ensure the child is contained within the protective elements of the child seat. A protective barrier between the child and the vehicle.
Ventilation Zones: Located in the rear interior and exterior of the seat, the zones offer improved airflow and increased comfort to your child in rearward facing.
Integrated Coloured Belt Paths: Clear, obvious coloured visual belt paths for easier-to-guide correct seat belt installation.
Improved Harness Adjuster: To assist in the prevention of child access, the harness adjuster button is now lower and inset.
Hassle Free Harness™: The frontal easy adjust headrest can be height adjusted without uninstalling the seat.
Flexi Infant Comfort Insert™: This cushion includes EVA composite material that provides support and protection for a small baby. Detachable wings making this cushion flexible for longer use as a seat protector or cushion pad. Remove as required.

Specifications

Key features

Colours: Black Opal, Grey Opal
Suitability: From birth to 4 years (approx.)
- Rearward Facing: From birth to 2- 3 years (approx.)
- Forward Facing: From 12mths to 4 years (approx.)
Dimensions (H x D x W):
- Forward Facing: 650 x 538 x 467mm
- Reaward Facing: 508 x 728 x 467mm

THERMO5® with Memory Foam Comfort: Body conforming memory foam properties combined with Thermo5® High Performance fabric gives your child active comfort where it matters most.
ISOFIX Compatible with ISOFLEX® Latch: ISOFLEX latch connectors allow for installation to vehicles with ISOFIX low anchorages. ISOFIX installation is an alternative method to traditional seatbelt installation.
Advanced Side Impact Cushion Technology (SICT): Advanced SICT is a deployable safety innovation with crumple zone technology. Located on the Headrest and Torso, the unique design combines advanced safety and freedom of space.
Rearward Facing Level Indicator: Visual level indicator designed to aid correct rearward installation angles. Full or partially visible, the level indicator offers you an optimal range during installation.
Protective Shell: The enclosed shell design provides enhanced shielding to ensure the child is contained within the protective elements of the child seat. A protective barrier between the child and the vehicle.
Ventilation Zones: Located in the rear interior and exterior of the seat, the zones offer improved airflow and increased comfort to your child in rearward facing.
Integrated Coloured Belt Paths: Clear, obvious coloured visual belt paths for easier-to-guide correct seat belt installation.
Improved Harness Adjuster: To assist in the prevention of child access, the harness adjuster button is now lower and inset.
Hassle Free Harness™: The frontal easy adjust headrest can be height adjusted without uninstalling the seat.
Flexi Infant Comfort Insert™: This cushion includes EVA composite material that provides support and protection for a small baby. Detachable wings making this cushion flexible for longer use as a seat protector or cushion pad. Remove as required.

Community Questions

Q: The Advanced SICT touches the other seat or child, is this OK?

A: The Advanced SICT should only be wound out on the door side and should not interact with another passenger or another car seat.

Q: Do I need Advanced SICT if the seat is fitted in the centre position?

A: No. This is what makes our b-first range so great and versatile. Why? Advanced SICT is specifically designed to crumple on impact and disperse large amounts of energy at a controlled rate. These kinds of forces are only seen on the impact side of the vehicle so there is no need to deploy Advanced SICT unless it is adjacent to a vehicle door.

Q: Is b-first safe if I don’t deploy the Advanced SICT?

A: Yes. The seat is certified with the Advanced SICT deployed and undeployed. For maximum protection unwind the Advanced SICT on the door side only.

Q: What is Crumple zone feature?

A: Crumple Zone is a "crash" term. In a car, it refers to the area of the car that crumples during an accident to help lower the crash forces during an impact. b-first's Advanced SICT is designed to crumple and lower the crash forces that your child will feel in a side collision.

Buy it from Baby Bunting

$749.00

Buy now

Community reactions

comfy seateasy to installgreat fit in the careasy to cleanwould definitely recommendnice cushioning

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