---
product_id: 712085348
title: "Britax One4Life Slim All-in-One Car Seat, 10 Years of Use, 17.5” SpaceSaver Design, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, ClickTight Installation, Parchment"
brand: "britax"
price: "¥81950"
currency: JPY
in_stock: false
category: "Britax"
url: https://www.desertcart.jp/products/712085348-britax-one4life-slim-all-in-one-car-seat-10-years
store_origin: JP
region: Japan
---

# 17.5” slim SpaceSaver design 10 years convertible use ClickTight 3-step secure install Britax One4Life Slim All-in-One Car Seat, 10 Years of Use, 17.5” SpaceSaver Design, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, ClickTight Installation, Parchment

**Brand:** britax
**Price:** ¥81950
**Availability:** ❌ Out of Stock

## Summary

> 🚗 Elevate every ride with 10 years of sleek, safe, and smart car seat innovation!

## Quick Answers

- **What is this?** Britax One4Life Slim All-in-One Car Seat, 10 Years of Use, 17.5” SpaceSaver Design, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, ClickTight Installation, Parchment by britax
- **How much does it cost?** ¥81950 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/712085348-britax-one4life-slim-all-in-one-car-seat-10-years)

## 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

- • **Eco-Chic & Easy Care:** Machine-washable recycled polyester cover with natural flame resistance keeps your car fresh and stylish.
- • **Slim Fit, Big Comfort:** 17.5” SpaceSaver design fits 3 across in most vehicles without sacrificing premium comfort or safety.
- • **Effortless Installation:** ClickTight system guarantees a secure, hassle-free install in just 3 simple steps—no guesswork needed.
- • **Smart Comfort & Convenience:** Adjustable 15-position harness and 9-position recline with cooling mesh and slide-out dishwasher-safe cup holders.
- • **One Seat, 10 Years of Safety:** Seamlessly converts from rear-facing infant to forward-facing booster for a decade of trusted protection.

## Overview

The One4Life Slim All-in-One Car Seat offers a decade of versatile use, converting effortlessly from rear-facing infant to forward-facing booster. Its 17.5” SpaceSaver design fits three across most vehicles, combining premium comfort with Britax’s patented safety features like SafeCell technology and a high-strength steel frame. Installation is a breeze with the ClickTight system, while eco-friendly, machine-washable covers and adjustable comfort settings ensure a stylish, hassle-free experience for modern families.

## Description

The One4Life(R) Slim all-in-one car seat takes your child from birth to big kid with trusted Britax safety, ClickTight(R) installation, and a slim SpaceSaver(TM) design. As a convertible and harness-2-booster seat in one, it grows with your child for 10 years. It starts rear-facing with an extended capacity of up to 50 lbs., so your child can ride rear-facing longer. It easily converts to forward-facing toddler mode (up to 65 lbs.) and high-back belt-positioning booster mode (up to 120 lbs.) when your child is ready. With a slim outside and spacious inside, the 17.5” seat is designed to fit 3 across* without compromising safety and comfort. ClickTight helps you install with confidence, every time. The base and shell are easy to wipe down for hassle-free cleanup. The car seat cover is safe to machine wash and dry, and it’s naturally flame-retardant with no added FR chemicals. One4Life Slim features a high-strength steel frame, a SafeCell(R) crumple zone, and a V-shaped tether. As your child grows, you can easily adjust the 15-position no-rethread harness and headrest with one hand. With cooling channels, premium padding, three infant inserts, and built-in armrests, your child will love every ride. *Britax cannot guarantee 3-across fitment in all vehicles.

## Features

- All-in-One Car Seat: One4Life(R) Slim is a convertible and harness-2-booster seat in one! It easily converts from a rear-facing infant and toddler seat (5-50 lbs.) to a forward-facing seat (30-65 lbs.) to a high-back booster seat (40-120 lbs.)
- ClickTight(R) Installation: Install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed!
- SpaceSaver(TM) Design: Slim outside, spacious inside! The 17.5” seat is designed to fit 3 across without compromising on trusted Britax safety and premium comfort *Britax cannot guarantee 3-across installation fitment in all vehicles
- Premium Car Seat Cover: Features a soft knit fabric with woven mélange accents that are made from recycled polyester; the cover is safe to machine-wash and dry and naturally flame retardant with no added FR chemicals
- Trusted Britax Safety: Features a patented V-shaped tether, SafeCell(R) technology, a high-strength steel frame, and two layers of energy management
- Comfortable Rides: This slim car seat includes soft comfort pads, built-in mesh cooling channels, three infant inserts, plush padding, and a tag-free headrest
- Easy to Adjust: The 15-position no-rethread harness and headrest adjust together easily with one hand, and the 9-position recline has an easy-read indicator to help you find the correct angle for your vehicle
- Slide-Out Cup Holders: The dishwasher-safe cup holders slide out with ease for convenient cleaning and click back into place for a secure attachment during rides
- Accessible Color-Coded Belt Paths: Make it easy to route the seat belt through the correct path for each car seat mode
- Hassle-Free Cleanup: Extra space between the shell and base means you can clean under the seat with ease – and with minimal grooves in the seating area and base, you can wipe it down with no fuss

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DPLJX7K9 |
| Age Range Description | Kid |
| Brand | Britax |
| Color | Parchment |
| Customer Reviews | 4.5 4.5 out of 5 stars (154) |
| Forward Facing Car Seat Minimum Height | 35 Inches |
| Forward Facing Maximum Weight | 120 Pounds |
| Forward Facing Minimum Weight | 30 Pounds |
| Harness Type | 5-Point |
| Infant Toddler Car Seat Type | Convertible Car Seat |
| Installation Type | Seat Belt |
| Item Dimensions D x W x H | 47D x 44.5W x 62.2H centimeters |
| Item Weight | 12.7 kg |
| Manufacturer | Britax USA |
| Material Type | Alloy Steel Plastic |
| Maximum Height Recommended | 49 Inches |
| Maximum Weight Recommendation | 120 Pounds |
| Minimum Height Recommendation | 18 Inches |
| Minimum Weight Recommendation | 5 Pounds |
| Model Number | E1D437G |
| Number of Height Positions | 15 |
| Orientation | Rear and Forward Facing |
| Part Number | E1D437G |
| Rear Facing Car Seat Maximum Height | 49 Inches |
| Rear Facing Maximum Weight | 50 Pounds |
| UPC | 652182750046 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Britax
- **Colour:** Parchment
- **Installation type:** Seat Belt
- **Material:** Alloy Steel Plastic
- **Orientation:** Rear and Forward Facing

## Images

![Britax One4Life Slim All-in-One Car Seat, 10 Years of Use, 17.5” SpaceSaver Design, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, ClickTight Installation, Parchment - Image 1](https://m.media-amazon.com/images/I/81+-eJrXeUL.jpg)

## Available Options

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

## Frequently Bought Together

- Britax One4Life Slim All-in-One Car Seat, 10 Years of Use, 17.5” SpaceSaver Design, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, ClickTight Installation, Mineral Gray
- 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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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-14*