---
product_id: 540663410
title: "One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Onyx Stone"
brand: "britax"
price: "451747 Ft"
currency: HUF
in_stock: true
url: https://www.desertcart.hu/products/540663410-one4life-convertible-car-seat-10-years-of-use-from-5
store_origin: HU
region: Hungary
---

# 10 years of secure use ClickTight easy install 15-position adjustable fit One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Onyx Stone

**Brand:** britax
**Price:** 451747 Ft
**Availability:** ✅ In Stock

## Summary

> 🚗 Elevate every ride with the only car seat your child will ever need!

## Quick Answers

- **What is this?** One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Onyx Stone by britax
- **How much does it cost?** 451747 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/540663410-one4life-convertible-car-seat-10-years-of-use-from-5)

## Best For

- britax enthusiasts

## Why This Product

- Trusted britax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Custom Comfort on the Go:** 15-position headrest and harness adjust together for a perfect fit every time.
- • **Advanced Safety Engineering:** Steel frame, SafeCell crumple zone, and patented tether for peace of mind.
- • **Parent-Approved Convenience:** Machine-washable cover and dishwasher-safe cup holders keep life hassle-free.
- • **One Car Seat, 10 Years of Safety:** From newborn to booster, covers 5 to 120 lbs with unmatched longevity.
- • **Effortless Installation with ClickTight:** Secure your child's seat in seconds—no guesswork, no stress.

## Overview

The Britax One4Life Convertible Car Seat is a versatile, all-in-one solution designed to grow with your child from 5 to 120 pounds and up to 63 inches tall. Featuring four configurations—from rear-facing infant to forward-facing booster—it combines advanced safety technologies like a steel frame and SafeCell crumple zone with user-friendly features such as ClickTight installation, a 15-position adjustable headrest and harness, and easy-to-clean materials. Engineered for comfort and convenience, it ensures a secure, comfortable ride for up to 10 years.

## Description

One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Onyx Stone

## Features

- 10 YEARS OF USE: The Britax One4Life all-in-one car seat delivers comfort and security from 5 to 120 pounds and up to 63 inches tall
- ONE CAR SEAT FOR LIFE: This car seat features 4 configurations, including rear facing infant car seat, rear facing toddler car seat, forward facing 5 point harness car seat, and forward facing high back booster seat
- INSTALL WITH CONFIDENCE: ClickTight(R) technology makes installation easy – simply open the seat, thread and buckle the seatbelt, and click the seat closed
- SAFETY YOU CAN TRUST: Equipped with a steel frame, SafeCell(TM) crumple zone, patented V-shaped tether, and two layers of energy management
- A SECURE FIT IN SECONDS: The 15-position headrest and harness move together using one hand, so you can quickly find the proper fit as your baby grows (no rethreading)
- REMOVABLE INSERT AND PILLOW: Helps keep your baby safe and comfortable under 20 lbs, and the tag-free headrest and pillow provide additional comfort and support without irritation
- 9-RECLINE POSITIONS: Quickly adjust between 9-recline positions and use the easy-read level indicators to find the correct angle for your vehicle
- PREMIUM PADDING AND COMFORT: The built-in cooling channels and ventilated mesh improve air flow to keep your child comfortable during every trip
- DISHWASHER-SAFE CUP HOLDERS: The 2 removable cup holders can be used for your little one's drink or snack and easily twist out for cleaning between rides
- MACHINE-WASHABLE COVER: The easy-to-remove car seat cover is safe to machine wash and dry; fabric and foam construction is naturally flame retardant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 20.5 x 19.5 x 25 inches |
| Item model number | E1C903T |
| Minimum weight recommendation | 5 Pounds |
| Maximum weight recommendation | 120 Pounds |
| Maximum height recommendation | 63 Inches |
| Material Type | Polypropylene |
| Material Composition | steel |
| Care instructions | Machine Wash |
| Style | One4Life |
| Number of reclining positions | 15 |
| Batteries required | No |
| Orientation | Forward Facing |
| Rear-facing minimum child weight | 5 Pounds |
| Rear-facing maximum child weight | 50 Pounds |
| Forward-facing minimum child weight | 22 Pounds |
| Forward-facing maximum child weight | 120 Pounds |
| Harness type | 5-Point |
| Item Weight | 30 pounds |

## Product Details

- **Brand:** Britax
- **Installation Type:** Seat Belt
- **Material:** Polypropylene
- **Color:** Onyx Stone
- **Orientation:** Forward Facing

## Images

![One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Onyx Stone - Image 1](https://m.media-amazon.com/images/I/81KJSVM4fVL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Frequently Bought Together

- Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Onyx Stone
- Britax Anti-Rebound Bar Accessory - Compatible with Britax One4Life Car Seats , Black
- Britax Car Seat Waterproof Liner - Moisture Wicking Fabric + No Slip Grip + Machine Washable + Crash Tested

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**Shop now:** [https://www.desertcart.hu/products/540663410-one4life-convertible-car-seat-10-years-of-use-from-5](https://www.desertcart.hu/products/540663410-one4life-convertible-car-seat-10-years-of-use-from-5)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-03*