Britax

Britax One4Life Slim All-in-One Car Seat

CA $729.99
Product Code:
Britax-One4Life-Slim-All-in-One-Car-Seat
UPC/EAN:
652182748364
faq_q_1:
Q: What makes the Britax One4Life Slim All-in-One Car Seat unique?
faq_a_1:
vA: The One4Life Slim offers the same trusted safety as the original model with a narrower 17-inch frame, saving backseat space while fitting 3-across in many vehicles.
faq_q_2:
Q: How long can my child use the Britax One4Life Slim?
faq_a_2:
A: Designed to grow with your child from 5–120 lbs, it transitions from rear-facing to forward-facing to booster mode—providing up to 10 years of safe, comfortable use.
faq_q_3:
Q: How easy is it to install the One4Life Slim All-in-One?
faq_a_3:
A: It features Britax’s ClickTight system—just open, thread, and click for a secure fit. Built-in tensioning ensures tight, foolproof installation using the seat belt or LATCH.
faq_q_4:
Q: Is the Britax One4Life Slim comfortable for daily use?
faq_a_4:
A: Yes. It includes ventilated padding, dual-layer side-impact protection, and multiple recline settings, keeping your child cool and supported on every ride.
faq_q_5:
Q: How do I clean the Britax One4Life Slim seat fabrics?
faq_a_5:
A: The seat cover removes easily and is machine washable. Use mild soap and water for the harness and shell. Always air dry to preserve material quality and safety performance.

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Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
  • Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
  • Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
  • Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
  • Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
  • Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
  • Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
  • Britax One4Life Slim All-in-One Car Seat - One4Life® Slim takes your child from birth to big kid with Britax safety, ClickTight® installation, and a slim 17.5” design, growing with your child for 10 years.
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The One4Life® Slim all-in-one car seat takes your child from birth to big kid with trusted Britax safety, ClickTight® installation, and a slim SpaceSaver™ 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® 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.

Manufacture's Warranty: Limited 1 Year

  • Description

  • File:Britax logo.svg - Wikipedia

    Descriptions

    The One4Life® Slim all-in-one car seat takes your child from birth to big kid with trusted Britax safety, ClickTight® installation, and a slim SpaceSaver™ 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® 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.

    Key Features

    • ClickTight Installation: Install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed!​
    • SpaceSaver™ Design​: Slim outside, spacious inside! 17.5” seat helps you save backseat space without compromising on trusted Britax safety and premium comfort.
    • Hassle-Free Cleanup​: Clean under the seat with ease – wipe it down with no fuss.​
    • Patented V-Shaped Tether: Staged-release stitches help slow and reduce forward movement during a crash.
    • High-Strength Steel Frame: Reinforces the seat structure to help keep it sturdy and stabilized.
    • Energy Management: Protective seat shell and foam-lined headrest help absorb impact energy.​
    • SafeCell® Technology​: Acts as a crumple zone, absorbing crash energy to help keep it away from your child.
    • 15-Position No-Rethread Harness: Adjusts quickly with one hand to help create the proper fit.​
    • Cooling Channels: Improves air flow to keep your child comfortable.
    • Premium Fabrics: Soft knit fabric with woven mélange accents that are made from recycled polyester. ​
    • Dishwasher-Safe Cup Holders: Slide out with ease for convenient cleaning. ​
    • High-Performance Car Seat Covers
      • Premium: Soft knit fabric with woven mélange accents for a tailored look.
      • Naturally Flame-Retardant withSafewash® Car seat cover is safe to machine wash and dry and naturally flame retardant with no added FR chemicals.​
      • Recycledn Polyester Accents: Woven mélange accents on the exterior and comfort pads are made from recycled polyester. ​
      • Stylish Colors: Trendy and fashionable options that parents and kids will love. ​

    Specifications

    • Product Weight: 12.7 kg (28 lbs)
    • Product Dimensions (L X W X H): 47 x 44.5 x 62.69 cm (18.5 x 17.5 x 24.5")
    • Rear-Facing Weight: 2.3-22.7 kg (5-50 lbs)
    • Rear-Facing Height: 124.5 cm (49")
    • Forward-Facing Weight: 10-29.5 kg (22-65 lbs)
    • Forward-Facing Height: 124.5 cm (49")
    • Belt-Positioning Booster Weight: 18.1-54.4 kg (40-120 lbs) 
    • Belt-Positioning Booster Height: 111.8-160 cm (44-63") 
    • Seat Back Compartment Height: 53.8 cm (21")
    • Seating Area Depth: 24.29 cm (13.5")
    • Seating Area Width: 29.21 cm (11.5")
    • Shoulder Width: 35.56 cm (14")
    • Harness Slot Heights: 22.86-48.26 cm (9-19")
    • Buckle Strap Depths: 13.97-22.23 cm (5.5-8.75")
    • Useful Life: 10 years
    • Children ride rear-facing to the highest weight or height specified.
    • Children should remain in a child seat with a 5-point harness until reaching the maximum weight or height allowed.
    • The top tether be used at ALL times when installing the child restraint forward-facing.

    Featured Accessories

    SAVER WATERPROOF LINER

    VEHICLE KICK MATS 2 PACK

    CAR SEAT SUN SHIELD

    Highlights

    •  
    •  
  • Reviews
  • products.faq

File:Britax logo.svg - Wikipedia

Descriptions

The One4Life® Slim all-in-one car seat takes your child from birth to big kid with trusted Britax safety, ClickTight® installation, and a slim SpaceSaver™ 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® 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.

Key Features

  • ClickTight Installation: Install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed!​
  • SpaceSaver™ Design​: Slim outside, spacious inside! 17.5” seat helps you save backseat space without compromising on trusted Britax safety and premium comfort.
  • Hassle-Free Cleanup​: Clean under the seat with ease – wipe it down with no fuss.​
  • Patented V-Shaped Tether: Staged-release stitches help slow and reduce forward movement during a crash.
  • High-Strength Steel Frame: Reinforces the seat structure to help keep it sturdy and stabilized.
  • Energy Management: Protective seat shell and foam-lined headrest help absorb impact energy.​
  • SafeCell® Technology​: Acts as a crumple zone, absorbing crash energy to help keep it away from your child.
  • 15-Position No-Rethread Harness: Adjusts quickly with one hand to help create the proper fit.​
  • Cooling Channels: Improves air flow to keep your child comfortable.
  • Premium Fabrics: Soft knit fabric with woven mélange accents that are made from recycled polyester. ​
  • Dishwasher-Safe Cup Holders: Slide out with ease for convenient cleaning. ​
  • High-Performance Car Seat Covers
    • Premium: Soft knit fabric with woven mélange accents for a tailored look.
    • Naturally Flame-Retardant withSafewash® Car seat cover is safe to machine wash and dry and naturally flame retardant with no added FR chemicals.​
    • Recycledn Polyester Accents: Woven mélange accents on the exterior and comfort pads are made from recycled polyester. ​
    • Stylish Colors: Trendy and fashionable options that parents and kids will love. ​

Specifications

  • Product Weight: 12.7 kg (28 lbs)
  • Product Dimensions (L X W X H): 47 x 44.5 x 62.69 cm (18.5 x 17.5 x 24.5")
  • Rear-Facing Weight: 2.3-22.7 kg (5-50 lbs)
  • Rear-Facing Height: 124.5 cm (49")
  • Forward-Facing Weight: 10-29.5 kg (22-65 lbs)
  • Forward-Facing Height: 124.5 cm (49")
  • Belt-Positioning Booster Weight: 18.1-54.4 kg (40-120 lbs) 
  • Belt-Positioning Booster Height: 111.8-160 cm (44-63") 
  • Seat Back Compartment Height: 53.8 cm (21")
  • Seating Area Depth: 24.29 cm (13.5")
  • Seating Area Width: 29.21 cm (11.5")
  • Shoulder Width: 35.56 cm (14")
  • Harness Slot Heights: 22.86-48.26 cm (9-19")
  • Buckle Strap Depths: 13.97-22.23 cm (5.5-8.75")
  • Useful Life: 10 years
  • Children ride rear-facing to the highest weight or height specified.
  • Children should remain in a child seat with a 5-point harness until reaching the maximum weight or height allowed.
  • The top tether be used at ALL times when installing the child restraint forward-facing.

Featured Accessories

SAVER WATERPROOF LINER

VEHICLE KICK MATS 2 PACK

CAR SEAT SUN SHIELD

Highlights

  •  
  •  
Britax Car Seat Sun Shield - The Britax Car Seat Sun Shield is an excellent way to keep your car seat cool and to it protect from damaging UV sun rays with its durable, reflective material.
Add to Cart

Britax Car Seat Sun Shield

CA $37.99
Descriptions The Britax Car Seat Sun Shield is an excellent way to keep your car seat cool and to it protect from damaging UV sun rays with its durable, reflective material. The Britax Car Seat Sun...
Add to Cart