Best Safety 1St 3 In 1 Car Seats in 2026

Built to grow: the 3 in 1 car seat built to grow for extended use through 3 stages: Rear facing 5 to 40 pounds, forward facing 22 to 65 pounds, and belt positioning booster 40 to 100 pounds

Side impact protection: The grow and go's side impact protection helps keep your child safe

Easy in, easy out: Harness holders keep the harness in an open position so it's easy to get your child in and out of the seat; Rear facing height is 19 to 40 inches; Forward facing height is 29 to 52 inches

Built to grow with your child, this safety 1st car seat supports infants from 5 pounds to toddlers of 40 pounds as a rear facing car seat, 22 to 65 pounds forward facing toddler car seat, and 40 to 100 pounds as a belt positioning booster

An adjustable 3 position recline makes it easy to get a good fit for the seat in your car, assembled product dimensions 24.00 inches x 19.00 inches x 23.75 inches

Harness holders keep the harness open, making it easier to get into and out of the seat; Front seat passengers can enjoy up to 7 inches more legroom with the rear facing infant seat's reduced footprint

Built to grow: The 3 in 1 car seat built to grow for extended use through 3 stages: Rear facing 5 to 40 pounds, forward facing 22 to 65 pounds, and belt positioning booster 40 to 100 pounds

Side impact protection: The grow and go’s side impact protection helps keep your child safe

Easy in, easy out: Harness holders keep the harness in an open position so it is easy to get your child in and out of the seat. Rear facing height is 19 to 40 inches. Forward facing height is 29 to 52 inches

Built to Grow: The 3 in 1 car seat built to grow for extended use through 3 stages: rear facing 5 40 pounds, forward facing 22 to 65 pounds, and belt positioning booster 40 to 100 pounds

SIDE IMPACT PROTECTION: The Grow and Go's side impact protection helps keep your child safe. 2 integrated cup holders. Grow with baby pillows for a comfortable ride

Easy In, Easy Out: Harness holders keep the harness in an open position so it’s easy to get your child in and out of the seat. Rear facing height is 19 to 40 inches. Forward facing height is 29 to 52 inches

BUILT TO GROW: The Safety 1st Grow and Go Convertible Car Seat is for extended use through 3 stages: Rear-facing 5-40 pounds, Forward-facing 22-65 pounds, and Belt-positioning booster seat 40-100 pounds.

SIDE IMPACT PROTECTION: The Grow and Go's side impact protection helps keep your child safe through all of the 3-in-1 convertible car seat’s stages.

EASY IN, EASY OUT: Harness holders keep the harness in an open position so it's easy to get your child in and out of the car seat.

Built to Grow: The 3 in 1 Car Seat Built to Grow for Extended Use Through 3 Stages: Rear FACing 5 40 Pounds, Forward FACing 22 to 65 Pounds, and Belt Positioning Booster 40 to 100 Pounds

Side impACt protection: the grow and go’s side impACt protection helps keep your child safe. Carton dimensions 24.25 inches x 19.25 inches x 24.5 inches, assembled product dimensions 24.00 inches x 19.00 inches x 23.75 inches

Easy in, easy out: harness holders keep the harness in an open position so it’s easy to get your child in and out of the seat. Rear fACing height is 19 to 40 inches. Forward fACing height is 29 to 52 inches

An extra-comfortable ride that lasts for years: rear-facing 5-40 pounds and forward-facing 22-65 pounds

Side Impact protection

Fits 3 across in the back seat of most vehicles

Able to serve your family through three different stages, this Safety 1st convertible car seat supports 5 to 40 pounds rear-facing, 22 to 50 pounds forward-facing, and 40 to 80 pounds as a belt-positioning booster

Harness holders keep the harness open, making it easier for your child to get into and out of the seat

You and your front seat passenger can enjoy up to seven inches more legroom with the rear-facing infant seat's reduced footprint

Extended Use: forward-facing with harness, 30-65 pounds and Belt-positioning Booster, 40-120 pounds

Designed to fit 3 ACROSS in most vehicles - Great for growing families and car pools

Lightweight and easy to move from car to car

Extended Use 3-in-1 Car Seat: Rear-facing 5-40 pounds, Forward-facing harness 22-50 pounds, and Belt-positioning 40-80 pounds

Side Impact Protection

Harness holders: with the harness held back, it's easy to get your child in and out of the seat

The guide 65 is a perfect fit for smaller cars and helps protect your child longer in both rear and forward facing positions

Rear-facing 5-40 pounds and 19inches-40inches

Forward-facing 22-65 pounds and 34inches-52inches

BUILT TO GROW: The Safety 1st Crosstown All-in-One Convertible Car Seat is for extended use through 3 stages: Rear-facing 5-40 pounds, Forward-facing 22-65 pounds, and Belt-positioning booster seat 40-100 pounds.

SIDE IMPACT PROTECTION: The Crosstown's side impact protection helps keep your child safe through all of the All-in-One convertible car seat’s stages.

SPRING ASSIST EZ OUT: Spring assist EZ out harness system keeps floppy straps propped up, making it easy to get child in and out of the seat

An extra-comfortable ride that lasts for years: Rear-facing 5-40 pounds and forward-facing 22-65 pounds

Side impact protection

Fits 3 across in the back seat of most vehicles

BUILT TO GROW: The Safety 1st Crosstown All-in-One Convertible Car Seat is for extended use through 3 stages: Rear-facing 5-40 pounds, Forward-facing 22-65 pounds, and Belt-positioning booster seat 40-100 pounds.

SIDE IMPACT PROTECTION: The Crosstown's side impact protection helps keep your child safe through all of the All-in-One convertible car seat’s stages.

SPRING ASSIST EZ OUT: Spring assist EZ out harness system keeps floppy straps propped up, making it easy to get child in and out of the seat

The car seat built to GROW for extended use through 3 stages: Rear-facing 5-40 pounds, Forward-facing 22-65 pounds, and Belt-positioning booster 40-100 pounds

Superior safety with Air Protect, an advanced cushion system that provides extra protection

A snap to clean! Machine washable and dryer safe seat pad, unsnaps and lifts away quickly from the seat frame for truly easy cleaning

FULL 360° ROTATION The Turn and Go 360 DLX All-in-One Convertible Car Seat is designed with our innovative SafetySwivel 360° rotational technology that lets you turn the car seat, bringing you face-to-face with your little one as you buckle and unbuckle.

INSTALLATION SIMPLIFIED WITH SECURETECH Safety 1st’s innovative technology solves the most common installation problem 7 out of 10 parents unknowingly have: loose vehicle belt tension. Red-to-green visual indicators show when the seat belt has tension.

INTENTIONAL DESIGN MEETS EVERY STANDARD Meets or exceeds all federal safety standards and is National Highway Traffic Safety Administration (NHTSA) compliant. Attached connection cord ensures base and seat must be used together when installed.

FULL 360° ROTATION The Turn and Go 360 DLX All-in-One Convertible Car Seat is designed with our innovative SafetySwivel 360° rotational technology that lets you turn the car seat, bringing you face-to-face with your little one as you buckle and unbuckle.

INSTALLATION SIMPLIFIED WITH SECURETECH Safety 1st’s innovative technology solves the most common installation problem 7 out of 10 parents unknowingly have: loose vehicle belt tension. Red-to-green visual indicators show when the seat belt has tension.

INTENTIONAL DESIGN MEETS EVERY STANDARD Meets or exceeds all federal safety standards and is National Highway Traffic Safety Administration (NHTSA) compliant. Attached connection cord ensures base and seat must be used together when installed.

BUILT TO GROW: The Safety 1st Grow and Go Convertible Car Seat is for extended use through 3 stages: Rear-facing 5-40 pounds, Forward-facing 22-65 pounds, and Belt-positioning booster seat 40-100 pounds.

SIDE IMPACT PROTECTION: The Grow and Go's side impact protection helps keep your child safe through all of the 3-in-1 convertible car seat’s stages.

EASY IN, EASY OUT: Harness holders keep the harness in an open position so it's easy to get your child in and out of the car seat.

BUILT TO GROW: The Safety 1st Grow and Go Convertible Car Seat is for extended use through 3 stages: Rear-facing 5-40 pounds, Forward-facing 22-65 pounds, and Belt-positioning booster seat 40-100 pounds.

SIDE IMPACT PROTECTION: The Grow and Go's side impact protection helps keep your child safe through all of the 3-in-1 convertible car seat’s stages.

EASY IN, EASY OUT: Harness holders keep the harness in an open position so it's easy to get your child in and out of the car seat.

BUILT TO GROW: The Safety 1st Grow and Go Convertible Car Seat is for extended use through 3 stages: Rear-facing 5-40 pounds, Forward-facing 22-65 pounds, and Belt-positioning booster seat 40-100 pounds.

SIDE IMPACT PROTECTION: The Grow and Go's side impact protection helps keep your child safe through all of the 3-in-1 convertible car seat’s stages.

EASY IN, EASY OUT: Harness holders keep the harness in an open position so it's easy to get your child in and out of the car seat.

FITS 3 ACROSS THE BACK SEAT The TriMate All-in-One Convertible Car Seat’s ultra-slim design allows parents to fit three across the back seat without sacrificing comfort. At just 17” across, it takes up less space, creating more room for passengers and big kids.

GROWS WITH YOUR CHILD Three modes of use accommodate children from birth to age 10: rear-facing (5–40 lbs.), forward-facing (22–65 lbs.), and belt-positioning booster (40–100 lbs.).

CLEAR AND SIMPLE INSTALLATION AND ADJUSTMENT The TriMate All-in-One features a headrest that adjusts quickly with just one hand, a hassle-free harness system that adjusts without complicated re-threading, and visible belt paths for easy installation.