Britax Poplar S Convertible Car Seat, Slim 17” Design — Ruby Onyx

$319.99$399.9920% OFF

Price as of September 12, 2026 at 4:08 AM

TagsAmazon Babies

2-IN-1 CONVERTIBLE CAR SEAT: The Poplar S takes the stress out of moving to the next car seat stage; fits 5-50 lbs and 18”-49” rear facing and easily switches to forward facing (30-65 lbs, 35”-49”) when your child is ready. *Due to regulatory changes, weight and height ranges may vary by model; always follow the weight and height specifications listed in your product's user guide and on your product labels
FAST, SECURE, & PARENT-FRIENDLY INSTALLATION: With ClickTight technology, you can install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed; the accessible color-coded belt paths make it easy to route the seat belt through the correct path for each mode
EXTENDED REAR FACING CAPACITY: This convertible car seat accommodates children up to 50 lbs and 49” rear facing, so your child can ride rear facing longer
SLIM 17” SPACESAVER SEAT: This child car seat is designed to fit 3 across* without compromising on trusted Britax safety or premium comfort, offering a slim outside and spacious inside. *Britax cannot guarantee 3-across installation fitment in all vehicles
REBOUNDREDUCE STABILITY BAR: Carbon steel bar easily attaches to the car seat when installed rear facing to help minimize movement in the event of a crash; must be removed when installed forward facing
TRUSTED BRITAX SAFETY: This slim car seat features a patented V-shaped tether, SafeCell technology, a high-strength steel frame, and two layers of energy management. The seat is side-impact tested according to FMVSS 213a.* It is also tested to FMVSS 213 frontal-impact standards. The car seat is verified by the Baby Safety Alliance. *FMVSS 213a sets side-impact standards for children up to 40 lbs and 43” with a 5-point harness. It does NOT include standards for testing harnessed children above 40 lbs and 43”
NATURALLY FLAME-RETARDANT SAFEWASH FABRICS: The cover is safe to machine-wash and dry and naturally flame retardant with no added FR chemicals; the cup holders are also dishwasher-safe for easy cleaning
REFINED COMFORT, TAILORED FIT: This baby and toddler car seat features premium padding, two infant inserts, and an optional head pad to help create an elevated fit and feel
EASY-ADJUST, 14-POSITION, NO-RETHREAD HARNESS: One-hand adjustments make it easy to find the right fit for your child as they grow; the 14-position harness and headrest move together easily – no rethreading required
6-POSITION RECLINE: With easy-read indicator to help you find the correct angle for your vehicle

2-IN-1 CONVERTIBLE CAR SEAT: The Poplar S takes the stress out of moving to the next car seat stage; fits 5-50 lbs and 18”-49” rear facing and easily switches to forward facing (30-65 lbs, 35”-49”) when your child is ready. *Due to regulatory changes, weight and height ranges may vary by model; always follow the weight and height specifications listed in your product's user guide and on your product labels
FAST, SECURE, & PARENT-FRIENDLY INSTALLATION: With ClickTight technology, you can install with confidence in 3 easy steps: pinch to open, thread and buckle, click it closed; the accessible color-coded belt paths make it easy to route the seat belt through the correct path for each mode
EXTENDED REAR FACING CAPACITY: This convertible car seat accommodates children up to 50 lbs and 49” rear facing, so your child can ride rear facing longer
SLIM 17” SPACESAVER SEAT: This child car seat is designed to fit 3 across* without compromising on trusted Britax safety or premium comfort, offering a slim outside and spacious inside. *Britax cannot guarantee 3-across installation fitment in all vehicles
REBOUNDREDUCE STABILITY BAR: Carbon steel bar easily attaches to the car seat when installed rear facing to help minimize movement in the event of a crash; must be removed when installed forward facing
TRUSTED BRITAX SAFETY: This slim car seat features a patented V-shaped tether, SafeCell technology, a high-strength steel frame, and two layers of energy management. The seat is side-impact tested according to FMVSS 213a.* It is also tested to FMVSS 213 frontal-impact standards. The car seat is verified by the Baby Safety Alliance. *FMVSS 213a sets side-impact standards for children up to 40 lbs and 43” with a 5-point harness. It does NOT include standards for testing harnessed children above 40 lbs and 43”
NATURALLY FLAME-RETARDANT SAFEWASH FABRICS: The cover is safe to machine-wash and dry and naturally flame retardant with no added FR chemicals; the cup holders are also dishwasher-safe for easy cleaning
REFINED COMFORT, TAILORED FIT: This baby and toddler car seat features premium padding, two infant inserts, and an optional head pad to help create an elevated fit and feel
EASY-ADJUST, 14-POSITION, NO-RETHREAD HARNESS: One-hand adjustments make it easy to find the right fit for your child as they grow; the 14-position harness and headrest move together easily – no rethreading required
6-POSITION RECLINE: With easy-read indicator to help you find the correct angle for your vehicle