can you use britax car seat without base Britax One4Life Slim All-in-One Car Seat

can you use britax car seat without base Britax One4Life Slim All-in-One Car SeatThe 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

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. 

• All-in-One Car Seat: One4Life® 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.)
• 10 Years of Use: This slim all-in-one car seat grows with your child from 5 to 120 lbs. and up to 63” tall
• ClickTight® Installation: Install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed!
• SpaceSaver™ Design: Slim outside, spacious inside! The 17.5” seat is designed to fit 3 across without compromising on trusted Britax safety and premium comfort.
• Premium Fabrics: The woven mélange accents give the car seat cover a tailored look, while the soft knit fabric on the padding and inserts helps keep your child comfortable during every ride
• Woven Accents on the Exterior and Comfort Pads: Made from recycled polyester
• 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
• SafeWash® Fabrics: No more hand-washing or waiting for the cover to air-dry; just quick and easy cleanup so you can keep moving
• Naturally Flame-Retardant Cover: With no added FR chemicals
• Three Removable Infant Inserts: Help provide a better fit for infants 20 lbs. and under
• Accessible Color-Coded Belt Paths: Make it easy to route the seat belt through the correct path for each car seat mode
• 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
  \Cup-Holder-Free Option: Remove the cup holders completely and insert the armrest caps to save additional space
• 15-Position No-Rethread Harness and Headrest: Adjust together quickly and easily with one hand to help create the proper fit as your child grows; no rethreading, ever!
• 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 with Easy-Read Indicators: Helps you find the most comfortable fit for your child and the correct angle for your vehicle
• SafeCell® Technology: Acts as a crumple zone, absorbing crash energy to help keep it away from your child
• Two Layers of Energy Management: The protective seat shell and foam-lined headrest help absorb impact energy and are designed to help keep your child's head, neck, and body safe
• Soft Comfort Pads: Help prevent the harness from rubbing against your child’s skin
• Flip-Forward Buckle Pad: Stays out of the way for easy boarding; made with extra padding for premium comfort
• Built-In Cooling Channels: Improve airflow to help keep your child comfortable
• Plush Padding: For superior comfort and a quiet ride
• 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
• 5-Point Safety Harness with Diamond Weave Webbing: Provides adjustment points at the hips, shoulders, and between the legs
• Tag-Free Headrest: Supports your child’s head and neck without irritation

*Britax cannot guarantee 3-across fitment in all vehicles.

Specifications

• Dimensions: 24.5"H x 18.5"D x 17.5"W
• Weight: 28 lbs.