Britax One4Life ClickTight All-in-One Car Seat - Onyx Stone

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Britax One4Life® ClickTight® All-in-One Car Seat - From Birth to Big Kid

The One4Life® ClickTight® All-in-One Car Seat grows with your child, offering trusted Britax® safety and effortless installation. It transitions seamlessly from a rear-facing infant seat to a forward-facing 5-point harness and finally into a belt-positioning high-back booster. With its strong steel frame, crumple zone, and advanced side-impact protection, you can be confident your child is secure on every ride.

Easy ClickTight® Installation

• Installs as simply as buckling a seat belt

• Quick access to the belt path for hassle-free setup

• Built-in seat belt tensioner ensures a secure fit every time

Key Features

• SafeCell® Technology: Acts as a crumple zone, diverting crash forces away from your child

• High-Strength Steel Frame: Reinforces seat structure for durability and stability

• Patented V-Shaped Tether: Staged-release stitches help slow and reduce forward motion during impact

• Two Layers of Side Protection: Foam-lined headrest and protective shell absorb crash energy around head, neck, and torso

• 5-Point Safety Harness: Strong diamond-weave webbing for dependable restraint

• Removable Infant Insert: Extra support for babies under 20 lbs (9.1 kg)

• 9-Position Recline: Adjusts easily for comfort and vehicle fit

• 15-Position Quick-Adjust Headrest & Harness: Grows with your child

• Color-Coded Belt Guides: Simplifies seat belt routing for all modes

• Level Indicators: Ensure proper recline angle during installation

• SafeWash® Fabric Cover: Machine-washable, dryer-safe, naturally flame-retardant

• Stay-Put Comfort Pads: Prevent harness irritation at the neck

• Removable Head Pillow: Added comfort for smaller riders

• Tag-Free Headrest: Gentle support with no scratchy labels

• One-Hand Harness Adjuster: Quick and easy tightening

• Flip-Forward Buckle Pad: Keeps straps out of the way for easy boarding

• Premium Padding & Ventilated Fabrics: Cushioned ride with built-in airflow channels

• Dishwasher-Safe Cup Holders: Twist out for easy cleaning

Specifications

Child Fit

• Rear-Facing Harness: 5–50 lbs (2.3–22.7 kg), under 49" (125 cm)

• Forward-Facing Harness: 22–65 lbs (10–30 kg), under 49" (125 cm)

• Belt-Positioning Booster: 40–120 lbs (18–54 kg), 44–63" (112–160 cm)

Exterior Dimensions

• Weight: 30 lbs (13.6 kg)

• Dimensions (L x W x H): 20.5" x 19.5" x 25" (52.07 x 49.53 x 63.5 cm)

• Fully Extended Headrest Height: 33.5" (85.09 cm)

• Fully Reclined Depth: 30" (76.2 cm)

• Fully Reclined + Extended Headrest Depth: 35.5" (90.17 cm)

Interior Dimensions

• Seating Depth: 13.25" (33.65 cm)

• Seating Width: 11" (27.94 cm)

• Shoulder Width: 14" (35.56 cm)

• Harness Slot Heights: 15 positions, 9–19" (22.86–48.26 cm)

• Buckle Strap Positions: 5.5", 6.75", 8.75" (13.97 / 17.14 / 22.22 cm)

Recommendation

Britax strongly recommends keeping children secured with the 5-point harness system until they exceed the maximum weight or height limits before transitioning to booster mode.