Britax One4Life Slim ClickTight All-in-One Car Seat

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The One4Life Slim all-in-one car seat is designed to grow with your child from birth through to their "big kid" years. It offers an extended rear-facing mode up to 22.7 kg (50 lbs), transitions easily into a forward-facing toddler seat (up to 29.5 kg/65 lbs), and then becomes a high-back booster seat (up to 54.4 kg/120 lbs).

With a compact 44.5 cm (17.5”) width, it helps save space in the backseat, while the ClickTight system ensures a secure installation every time. This slim, easy-to-clean car seat features a machine-washable cover with no added fire-retardant chemicals.

Features & Benefits

Reliable Britax Safety:
Equipped with an anti-rebound bar, a patented V-shaped tether, SafeCell® technology, a high-strength steel frame, and dual layers of energy management for top-tier protection.

15-Position Harness and Headrest:
Easily adjusts with one hand, growing with your child to ensure a perfect fit—no rethreading required!

Quick-Push, 9-Position Recline:
Allows you to quickly find the ideal position for your child’s comfort and the proper angle for your vehicle.

Premium Fabrics:
Soft knit fabric with woven mélange accents, crafted from recycled polyester for a sustainable and comfortable ride.

Machine Washable & Dryer Safe:
Free from FR chemicals, our fabrics are easy to clean and quick to dry, so you can get back on the road in no time.

Slide-Out Cup Holders:
Dishwasher-safe cup holders that effortlessly slide out for hassle-free cleaning.

Built-In Cooling Channels:
Designed to enhance airflow and keep your child cool and comfortable during the ride.

Ultimate Comfort:
This slim car seat features comfort pads, built-in cooling channels, three infant inserts, plush padding, and a tag-free headrest for a cozy experience.

5-Point Safety Harness:
Provides optimal safety by evenly distributing crash forces, keeping your child secure in the event of a collision.

High-Performance Car Seat Covers
Featuring gray/tan padding and headrest cushioning, designed for durability and comfort.

Premium Design
Soft knit fabric with woven mélange accents offers a stylish, tailored look.

Naturally Flame-Retardant with SafeWash®
Machine-washable and dryer-safe, the car seat cover is naturally flame-retardant without any added FR chemicals.

Recycled Polyester Accents
The woven mélange accents on the exterior and comfort pads are made from recycled polyester for a more sustainable choice.

Child Fit Information

• Rear-Facing Weight: 2.3-22.7 kg (5-50 lbs)

• Rear-Facing Height: 124.5 cm (49")

• Forward-Facing Weight: 10-29.5 kg (22-65 lbs)

• Forward-Facing Height: 124.5 cm (49")

• Belt-Positioning Booster Weight: 18.1-54.4 kg (40-120 lbs) 

• Belt-Positioning Booster Height: 111.8-160 cm (44-63") 

Exterior Product Dimensions

• Product Weight: 12.7 kg (28 lbs)

• Product Dimensions (L X W X H): 47 x 44.5 x 62.69 cm (18.5 x 17.5 x 24.5")

Interior Product Dimensions

• Seat Back Compartment Height: 53.8 cm (21")

• Seating Area Depth: 24.29 cm (13.5")

• Seating Area Width: 29.21 cm (11.5")

• Shoulder Width: 35.56 cm (14")

• Harness Slot Heights: 22.86-48.26 cm (9-19")

• Buckle Strap Depths: 13.97-22.23 cm (5.5-8.75")