--- product_id: 690342768 title: "One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam" brand: "britax" price: "5630.84 DT" currency: TND in_stock: true url: https://www.desertcart.tn/products/690342768-one4life-slim-all-in-one-car-seat-up-to-10 store_origin: TN region: Tunisia --- # Slim 17.5” width fits 3 across* 15-position no-rethread harness & headrest ClickTight® 3-step installation One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam **Brand:** britax **Price:** 5630.84 DT **Availability:** ✅ In Stock ## Summary > 🚗 Elevate every ride with the all-in-one car seat that grows as fast as your little one! ## Quick Answers - **What is this?** One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam by britax - **How much does it cost?** 5630.84 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/690342768-one4life-slim-all-in-one-car-seat-up-to-10) ## 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 - • **Space-Smart Design:** Slim 17.5” width lets you fit 3 car seats across* without sacrificing comfort or safety. - • **Effortless Installation:** ClickTight® system guarantees a secure fit in just 3 simple steps—no guesswork, no stress. - • **Hassle-Free Maintenance:** Machine-washable recycled fabric cover and easy-clean shell keep your car seat fresh and ready for every adventure. - • **Premium Comfort & Safety:** Built-in cooling mesh, plush padding, and SafeCell® tech with a high-strength steel frame protect and pamper your child. - • **Grow-With-You Versatility:** From newborn rear-facing to high-back booster—one seat for 10 years of safe rides. ## Overview The Britax One4Life Slim All-in-One Car Seat in Sea Foam is a versatile, space-saving solution designed to safely accommodate children from 5 to 120 pounds over 10 years. Featuring patented SafeCell® safety technology, a high-strength steel frame, and ClickTight® installation for effortless, secure setup, it offers premium comfort with cooling mesh channels and plush padding. Its slim 17.5” width is engineered to fit three across in most vehicles, while the machine-washable, recycled polyester cover ensures easy maintenance. Adjustable with a 15-position no-rethread harness and 9-position recline, this seat combines safety, convenience, and style for the modern family on the go. ## 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 | B0DPLJLGG7 | | Age Range Description | Kid | | Best Sellers Rank | #2,537 in Baby ( See Top 100 in Baby ) #13 in Convertible Child Safety Car Seats | | Brand | Britax | | Color | Sea Foam | | Customer Reviews | 4.4 4.4 out of 5 stars (225) | | 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 | 18.5"D x 17.5"W x 24.5"H | | Item Highlight | Rear Facing, Forward Facing, & Booster Mode, 17. | | Item Weight | 28 pounds | | 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 | E1D437F | | Number of Height Positions | 15 | | Orientation | Rear and Forward Facing | | Part Number | E1D437F | | Rear Facing Car Seat Maximum Height | 49 inches | | Rear Facing Maximum Weight | 50 pounds | | UPC | 652182750039 652182750022 | | Unit Count | 1 Count | ## Product Details - **Brand:** Britax - **Color:** Sea Foam - **Installation Type:** Seat Belt - **Material:** Alloy Steel, Plastic - **Orientation:** Rear and Forward Facing ## Images ![One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam - Image 1](https://m.media-amazon.com/images/I/412g+J5wxeL.jpg) ![One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam - Image 2](https://m.media-amazon.com/images/I/51ITwG4to0L.jpg) ![One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam - Image 3](https://m.media-amazon.com/images/I/51dH4MUB4hL.jpg) ![One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam - Image 4](https://m.media-amazon.com/images/I/51fLepG7EdL.jpg) ![One4Life Slim All in One Car Seat, Up to 10 Years Use — Sea Foam - Image 5](https://m.media-amazon.com/images/I/51IX-CQ3kEL.jpg) ## Available Options This product comes in different **Color, Style** 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, Sea Foam - 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/690342768-one4life-slim-all-in-one-car-seat-up-to-10](https://www.desertcart.tn/products/690342768-one4life-slim-all-in-one-car-seat-up-to-10) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-19*