| Child Fit Information | |
|---|---|
| Rear-facing Harnessed Weight | 5 - 50 lbs |
| Rear-facing Harnessed Height | Less than 49" |
| Forward-facing Harnessed Weight | 22 - 65 lbs |
| Forward-facing Harnessed Height | Less than 49" |
| Belt Positioning Booster Weight | 40 - 120 lbs |
| Belt Positioning Booster Height | 44 - 63" |
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
britax marathon g4 1 convertible car seat onyx Britax One4Life ClickTight All In One Car SeatOne4Life convertible to booster car seat grows with your child for 10 yearsfrom 5 120 lbs & up to 63 tall. As the only all in one with ClickTight, its easy to install in seconds, so youll know its right. Every time. Travel with peace of mind, knowing your child is surrounded in Trusted Britax Safety and Full Body Protection.. The new One4Life Premium ClickTight All in One (Ace Black) is dressed in a chic black knit fabric with luxe camel colored vegan
One4Life convertible to booster car seat grows with your child for 10 years—from 5-120 lbs & up to 63” tall. As the only all-in-one with ClickTight, it’s easy to install in seconds, so you’ll know it’s right. Every time. Travel with peace of mind, knowing your child is surrounded in Trusted Britax Safety and Full Body Protection..
The new One4Life Premium ClickTight All-in-One (Ace Black) is dressed in a chic black knit fabric with luxe camel-colored vegan leather accents. It offers effortless maintenance with lasting mess-proof protection thanks to the exclusive combination of StayClean: stain, moisture, and odor resistant technology + SafeWash: washer/dryer friendly, naturally flame retardant with no added chemicals.
Allow for 2 week shipping time.
Features you will love:
Converts from a rear-facing infant seat (5- 50lb) to a forward-facing 5-point harness seat (22-65 lbs) to a high-back belt-positioning booster seat (40- 120lb).
10 years of use: grows with your child from 5 – 120 lbs.
ClickTight Installation. Install with confidence, every time. You’ll know it’s right in just 3 easy steps: Pinch to open. Thread & buckle. Click it closed.
15-Position, Quick-Adjust Headrest & Harness create the proper fit as your child grows.
Patented V-Shaped Tether with staged-release stitches helps slow and reduce forward movement during a crash.
High Strength Steel Frame reinforces the seat structure to help keep it sturdy and stabilized.
Quick-Push, 9-Position Recline helps you find the most comfortable fit for your child and the best fit for your vehicle.
SafeCell Technology acts as a crumple zone, absorbing crash energy to help keep it away from your child.
Easy-Read Level Indicators help you find the correct recline angle when installing the car seat.
2 Layers of Side Impact Protection: Energy-absorbing shell and foam-lined surround your child’s head, neck & torso.
Stay-Put, Soft Comfort Pads help prevent the harness from rubbing against your child’s delicate neck.
Flip-Forward Buckle Pad stays out of the way for easy boarding; made with extra padding for premium comfort.
Built-In Cooling Channels & Ventilated Mesh improve air flow to keep your child comfortable.
Color-Coded Belt Guides make it easy to route the seat belt through the correct paths for rear-facing, forward-facing, and booster mode.
Removable Cover for easy cleaning without taking off the harness.
Harness Compartment neatly stores straps and buckles within the seat while in booster mode.
Dishwasher-Safe Cupholders easily twist out for cleaning between rides.
Removable Infant Insert helps keep your tiny baby safe and comfortable under 20 lbs.
Removable Head Pillow provides additional comfort for your growing baby.
Easy-Pull Harness Adjuster lets you tighten the harness using just one hand.
Harness Holder Slots keep the harness straps out of the way while your child gets in and out of the seat.
Tether Storage keeps the tether straps organized and out of the way when not in use.
Built-In Arm Rests keep your child happy and comfortable while they ride.
5-Point Safety Harness with diamond weave webbing.
Tag-Free Headrest supports your child’s head and neck without irritation.
Product Size
| Exterior Product Dimensions | |
|---|---|
| Product Weight | 30 lbs |
| Product Dimensions (L x W x H) | 20.5" (L) x 19.5" (W) x 25" (H) |
| Headrest Fully Extended Height | 33.5" |
| Fully Reclined Depth | 30" |
| Fully Reclined and Headrest Fully Extended Depth | 35.5" |
| Interior Product Dimensions | |
|---|---|
| Seating Area Depth | 13.25" |
| Seating Area Width | 11" |
| Shoulder Width | 14" |
| Harness Slot Heights | 15 positions, 9" - 19" |
| Buckle Strap Positions | 5.5" / 6.75" / 8.75" |
| Recommendation |
|---|
| Britax strongly recommends that children should be secured with a harness system until they exceed the weight or height limits specified. |
Care
Read how to care for your car seat here
Warranty
Limited 1 year warranty information can be found here. 10 year expiration.
Video
Product Origin: Proudly designed, tested and built in the USA with US and global components for safety and quality.
About Britax
At Britax, we believe family life should be lived without limit. A world where parents and children are free to make the most of every moment together. And we think it's our responsibility to make this happen. By driving safety standards to ensure children have never been better protected on the move. By pushing boundaries in smart design to make life in motion run smoothly. By extending a helping hand – or two – and always celebrating the journey.
We've been leading the way in child safety technology for more than 70 years. Always innovating, always focusing on what's best for the child, always going beyond 'good enough'. From Europe's best-selling car seat brand, we've become one of the brands most trusted by American families since we launched here in 1996.
Since then, we've revolutionized side impact protection, transformed safe seat installation, and introduced a range of smart strollers designed around the changing needs of today's families.
Our ongoing, open-ended conversation with parents is complemented by our work with car manufacturers, government bodies, and child passenger safety experts – collaborating, advising and using our industry-leading testing facilities to continually find ways to give parents the products and the reassurance to live family life without limit.
Because we believe in helping every parent and every child find their family freedom.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 2031 reviews
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Product Reviews
★★★★★ 1
Lower Quality than Competitors
Color: Black, Size: 8' Wide x 30" Tall
Construction is different from the Wall I brought from Children's Factory. Would recommend going there for a higher quality product and to save some money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 4
Well made… for children?
Color: Black, Size: 8' Wide x 30" Tall
This review is for the 30” tall one.
I’m honestly struggling to find a great use case for how short this is.
I don’t have children or am associated with any institution where they may be some.
I could see it being used for creating that type of sound barrier.
The panel itself is very well made. Looks and feels like an air wall that you’d see in a convention center.
I can absolutely tell there’s an acoustic absorption property to it.
The whole thing unrolls quickly and is fast to deploy.
As far as privacy goes, it’s kind of useless unless you are trying to wall in small children.
I can’t really say the value is all here for this. Seems quite a bit more expensive than it’s worth.
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Reviewed in the United States on January 29, 2026
★★★★★ 5
Partition Wall
Color: Black, Size: 8' Wide x 30" Tall, Color: Black, Size: 8' Wide x 30" Tall
I ordered this to do a room divider for my grandkids can have there own space while sharing a room it gives the privacy the wall is very sturdy and heavy was easy to assemble the quality is great able to use individual or together for longer division great value for the money
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Reviewed in the United States on March 3, 2026
★★★★★ 5
Very pleased
Color: Black, Size: 8' Wide x 30" Tall
This works great, and I find it to be very effective at soundproofing. The hinge is good quality, and it rolls up easily. It is slightly on the heavier side, but that is to be expected considering its larger size. The materials used to make it are top quality, and it will last a long time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026
★★★★★ 5
Who Knew!!!
Color: Grey, Size: 8' Wide x 6'6" Tall
We did not know what to expect. This exceeded our expectations. Everyone asks where we got this. Its perfoect portable space divider for the office.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026