Top 10 Best Slim Carseats Fits 3 Across
of November 2024
1
Best Choice
Cosco
Cosco
Cosco Kids MightyFit LX Convertible Car Seat, Canyon
10
Exceptional
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2
Best Value
Cosco
Cosco
Cosco Mighty Fit 65 DX Convertible Car Seat, Heather Onyx
9.9
Exceptional
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3
Safety 1st
Safety 1st
Safety 1st Grand 2-in-1 Booster Car Seat, Extended Use: Forward-Facing with Harness, 30-65 pounds and Belt-Positioning Booster, 40-120 pounds, Dunes Edge
9.8
Exceptional
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4
Cosco
Cosco
Cosco Finale Dx 2-In-1 Combination Booster Car Seat, Sport Blue, 1 Count (Pack of 1)
9.7
Exceptional
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5
Cosco
Cosco
Cosco Empire All-in-One Convertible Car Seat, Moxy
9.6
Exceptional
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6
Safety 1st
Safety 1st
Safety 1st Boost-and-Go All-in-1 Harness Booster car seat, 3-in-1 Booster for Extended use: Forward-Facing Harness, high-Back Belt-Positioning Booster and Backless Booster, Dunes Edge
9.5
Excellent
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7
Safety 1st
Safety 1st
Safety 1st Guide 65 Convertible Car Seat, Chambers, Black
9.4
Excellent
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8
Cosco
Cosco
Cosco Topside Backless Booster Car Seat, Leo
9.3
Excellent
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9
Cosco
Cosco
Cosco Onlook 2-in-1 Convertible Car Seat, Rear-Facing 5-40 pounds and Forward-Facing 22-40 pounds and up to 43 inches, Black Arrows
9.2
Excellent
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10
Safety 1st
Safety 1st
Safety 1st Getaway All-in-One Convertible Car Seat, Haze
9.1
Excellent
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11
Safety 1st
Safety 1st
Safety 1st Grow and Go All-in-One Convertible Car Seat, Evening Dusk
9.0
Excellent
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12
Maxi-Cosi
Maxi-Cosi
Maxi-Cosi Pria 3-in-1 Convertible Car Seat, Peach Amber
8.9
Very Good
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13
Maxi-Cosi
Maxi-Cosi
Maxi-Cosi Rodi Sport Booster Car Seat, Midnight Black
8.8
Very Good
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14
Safety 1st
Safety 1st
Safety 1st Grow and Go Flex 8-in-1 Travel System, Foundry
8.7
Very Good
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15
Cosco
Cosco
Cosco Rise Backless Booster Car Seat, Ripple
8.6
Very Good
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16
bubblebum
bubblebum
bubblebum Inflatable Booster Car Seat - Blow Up Narrow Backless Booster Car Seat for Travel. Portable Booster Seat for Toddlers, Kids, Child
8.5
Good
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17
Safety 1st
Safety 1st
Safety 1st Jive 2-in-1 Convertible Car Seat, Rear-facing 5-40 pounds and Forward-facing 22-65 pounds, Harvest Moon
8.4
Good
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18
Graco
Graco
Graco Slimfit 3 in 1 Car Seat | Slim & Comfy Design Saves Space in Your Back Seat, Katrina
8.3
Good
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19
Diono
Diono
Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear Facing & Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Jet Black
8.2
Good
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20
Graco
Graco
Graco Contender Slim Convertible Car Seat, West Point
8.1
Good
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21
Diono
Diono
Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet
8.0
Good
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22
Chicco
Chicco
Chicco MyFit Harness + Booster Car Seat, Gardenia
7.9
Good
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23
Graco
Graco
Graco TriRide 3 in 1 Car Seat | 3 Modes of Use from Rear Facing to Highback Booster Car Seat, Clybourne
7.8
Good
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24
Baby Trend
Baby Trend
Baby Trend Trooper 3-in-1 Convertible Car Seat, Moondust (CV01C87B)
7.7
Good
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25
Graco
Graco
Graco Tranzitions 3 in 1 Harness Booster Seat, Proof
7.6
Good
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26
Diono
Diono
Diono Radian 3RX 3-in-1 Rear and Forward Facing Convertible Car Seat, Adjustable Head Support & Infant Insert, 10 Years 1 Car Seat Ultimate Safety and Protection, Slim Fit 3 Across, Jet Black
7.5
Good
View on Amazon
About Slim Carseats Fits 3 Across
Click here to learn more about these products.
Cosco Kids MightyFit LX Convertible Car Seat, Canyon
An extra-comfortable ride that lasts for years Rear-facing 5-40 pounds and Forward-facing 22-65 pounds. Fits 3 across in the back seat of most vehicles. Side Impact Protection. 5-point harness with easy up-front adjustment.
Cosco Mighty Fit 65 DX Convertible Car Seat, Heather Onyx
An extra-comfortable ride that lasts for years Rear-facing 5-40 pounds and Forward-facing 22-65 pounds. Fits 3 across in the back seat of most vehicles. Gives parent in the front seat more leg room. Side Impact Protection.
Safety 1st Grand 2-in-1 Booster Car Seat, Extended Use: Forward-Facing with Harness, 30-65 pounds and Belt-Positioning Booster, 40-120 pounds, Dunes Edge
Forward-facing with harness, 30-65 pounds and Belt-positioning booster, 40-100 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. Deluxe fabric gives kids a comfy ride.
Cosco Finale Dx 2-In-1 Combination Booster Car Seat, Sport Blue, 1 Count (Pack of 1)
MAYBE THE LAST CAR SEAT YOULL EVER NEED The Cosco Kids Kids Finale DX 2-in-1 Booster Car Seat features two modes forward-facing harness booster 3065 lbs., 3249, and at least 1 year old, and belt-positioning booster 40100 lbs. and 4352.. LIGHTWEIGHT AND CARPOOL-READY Perfect for families on the go, the Cosco Kids Finale DX is light and easy to move from car to car.. FITS 3 ACROSS THE BACK SEAT Narrow design fits 3 across the back seat of most vehicles for growing families with multiple kids in car seats at the same time.. EASY CLEAN-UP Removable seat pad is machine-washable and dryer-safe..
Cosco Empire All-in-One Convertible Car Seat, Moxy
ONE HAND ADJUST With our new single hand adjustable headrest, keeping up with your child's growth has never been easier.. BUILT TO GROW The All-in-One 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.. SIDE IMPACT PROTECTION The Grow and Go Sprint's side impact protection helps keep your child safe. Plus, the 3-position recline makes it easy to get a good fit in your car.. 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. Clearly visible booster belt path allows for easier buckling..
Safety 1st Boost-and-Go All-in-1 Harness Booster car seat, 3-in-1 Booster for Extended use: Forward-Facing Harness, high-Back Belt-Positioning Booster and Backless Booster, Dunes Edge
GROWS WITH YOUR CHILD The Boost-and-Go 3-in-1 Harness Booster grows with your child for extended use, from forward-facing harness mode 3065 lbs. and 3449 to high-back belt-positioning booster and backless booster modes 40100 lbs. and 4357.. EASILY ADJUSTABLE HEADREST With one hand, parents can easily adjust the Boost-and-Gos headrest to seven different positions that grow with your child.. DISHWASHER-SAFE CUP HOLDERS Kids will love having their own cupholders and parents will love that the cupholders are removable and dishwasher safe.. FITS 3 ACROSS IN STANDARD BACK SEATS The Boost-and-Gos narrow design allows parents to comfortably fit more in the back seat without sacrificing comfort. The seat is also lightweight and portable for parents on the go..
Safety 1st Guide 65 Convertible Car Seat, Chambers, Black
2 modes of use Rear-facing 5-40 pounds and Forward-facing 22-65 pounds. Fits 3 across in the back seat of most vehicles. Side Impact Protection. 5-point harness with up-front adjustment.
Cosco Topside Backless Booster Car Seat, Leo
This Cosco Kids backless booster securely fits in your car and gives your child the extra height they need to keep seatbelts properly positioned..
Cosco Onlook 2-in-1 Convertible Car Seat, Rear-Facing 5-40 pounds and Forward-Facing 22-40 pounds and up to 43 inches, Black Arrows
With two modes of use, this LATCH-equipped Cosco Kids car seat accommodates infants from 5 pounds up to toddlers weighing 40 pounds in rear-facing mode and kids up to 40 pounds in forward-facing mode.. The five-point harness adjusts easily from the front of the seat and features six heights and three buckle locations.. In both the rear-facing and forward-facing modes, built-in side-impact protection keeps your little one extra secure.. Easily remove the machine-washable and dryer-safe car seat pad to clean..
Safety 1st Getaway All-in-One Convertible Car Seat, Haze
With two modes of use, this LATCH-equipped Safety 1st car seat accommodates infants from 5 pounds up to toddlers weighing 40 pounds in rear-facing mode and kids up to 40 pounds in forward-facing mode.. The five-point harness adjusts easily from the front of the seat and features six heights and three buckle locations.. In both the rear-facing and forward-facing modes, built-in side-impact protection keeps your little one extra secure.. Easily remove the machine-washable and dryer-safe car seat pad to clean..
Safety 1st Grow and Go All-in-One Convertible Car Seat, Evening Dusk
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 seats 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.. QUICKFIT HARNESS With the QuickFit Harness you can easily adjust both the harness and headrest with one hand..
Maxi-Cosi Pria 3-in-1 Convertible Car Seat, Peach Amber
DESIGNED FOR KEEPING UP WITH YOUR GROWING FAMILY The Pria All-in-One Convertible Car Seat is all about quick and easy, comfy and secure. Pria will simplify your life and ease your mind as you and your child journey together in the years ahead.. TRANSITION THROUGH THE STAGES Pria is thoughtfully designed to support your child as they grow rear-facing 440 lbs. and 1940, forward-facing 2265 lbs. and 2949, and belt-positioning booster 40100 lbs. and 4352.. PURE COZY HAPPY KIDDO YOU Our ultra-soft, yet durable, PureCosi fabrics and padding are made without wool or added fire retardant treatment, which is better for your child and our planet. Machine wash and dry. Available in select color options.. FUSS-FREE IN-AND-OUT Prias easy in-and-out harness holders keep straps from getting in the way when you put your little one in the car seat and take them out. Eliminating the struggle means more time for fun..
Maxi-Cosi Rodi Sport Booster Car Seat, Midnight Black
THE LAST CAR SEAT YOULL EVER NEED Parents celebrate the transition from the toddler to big kid stage when their children can securely buckle up on their own. The RodiSport Booster Car Seat is a 2-in-1 favorite that helps make those changes easy.. GO BACKLESS WHEN THEYRE READY Give your big kid a relaxing ride with the RodiSports multi-positioning, reclining backrest. When they no longer need or want the back support, simply remove it to convert the RodiSport to a convenient, backless booster.. KEEP UP WITH THE GROWTH SPURTS The 1-handed headrest adjustment on the backrest provides 7 height positions to help keep your kiddo comfy as they grow and grow.. MAINTAIN PROPER BELT POSITIONING Easy-to-use vehicle shoulder and lap belt guides help keep the seat belt properly positioned on your not-so-little one..
Safety 1st Grow and Go Flex 8-in-1 Travel System, Foundry
8 easy strolling options carriage, infant car seat carrier, travel system and stroller all reversible. Tons of storage extra-large basket, parent tray with 2 cup holders child tray with cup holder that accepts 2-handled sippy cup. Featured rear-facing infant car seat onBoard 35 FLX with cozy knit cushions for head and full torso, ensuring comfort and fit from 4-35 lbs. Stroller folds to fit 1. Tall, slim fold 2. Fold footrest over for smaller spaces or 3. Remove seat to stow in two smaller parts.
Cosco Rise Backless Booster Car Seat, Ripple
Backless booster car seat 40100 pounds and 43 to 57 in height. Wide base and higher arm rests make it easy for kids to buckle themselves in. Stable platform designed to let kids get in and out of the seat without it tipping. Includes shoulder belt positioning clip for a customized fit.
bubblebum Inflatable Booster Car Seat - Blow Up Narrow Backless Booster Car Seat for Travel. Portable Booster Seat for Toddlers, Kids, Child
The Ultimate Travel Booster Car Seat - Unlock the convenience of the USAs Original backless inflatable booster seat. BubbleBum is the only inflatable childrens booster seat for your car with a patented system to guarantee stability and comfort on every journey. Safety You Can Count On BubbleBums patented ComfortMax technology exceeds all US federal car safety standards FMVSS213 for booster car seats 40 lbs and up to 100 lbs. Your car booster seat comes with a seat belt positioning clip for optimal seat belt fit and comfort. Take Anywhere Travel Car Seat Your inflatable carseat is perfect for everyday use, car rentals, taxis, vacations and carpooling. Take your new backless booster seat on all your school trips and adventures. Perfect for your little toddlers, girls and boys aged 4 to 11 years old. Practical Dimensions Fits a Car Load of Kids The narrow, compact and slim BubbleBum booster seat is perfect for the middle seat, even small cars. It fits between 2 full-size car seats, allowing 3 kids across the back of almost any car. Global Award Winner - BubbleBum has won the Mom's Best Award, and the Parent Tested Parent Approved' award, plus dozens more. Ask our millions of happy car seat customers how much they trust the BubbleBum name. Your Bubblebum Car Booster Seat also comes with a lifetime guarantee.
Safety 1st Jive 2-in-1 Convertible Car Seat, Rear-facing 5-40 pounds and Forward-facing 22-65 pounds, Harvest Moon
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. 2 removable dishwasher-safe cup holders Machine washable and dryer safe fabrics. 5-point harness with easy up-front adjustment.
Graco Slimfit 3 in 1 Car Seat | Slim & Comfy Design Saves Space in Your Back Seat, Katrina
Fits 3 car seats across, saving space in your back seat without compromising on the safety you trust and the features you need. 3-in-1 car seat grows with your child from rear-facing harness 5-40 lb to forward-facing harness 22-65 lb to highback booster 40-100 lb. Measures 16.7 inches wide, with a spacious seat for your child's comfort and a slim design for more room in the back seat. Graco ProtectPlus Engineered a combination of the most rigorous crash tests that helps to protect your child in frontal, side, rear rollover crashes. 10-position No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together.
Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear Facing & Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Jet Black
REAR-FACING FOR LONGER - Designed and engineered to keep your child rear facing even longer up to 50 lb 22.7 kg, approx. 4 years old. 10 YEARS ONE CAR SEAT - With 4 ways to travel from birth to booster, the Radian 3R adapts as your child grows to offer a custom fit from birth up to 120 lb 54 kg. STEEL CORE - Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect. THE ORIGINAL RADIAN 3 ACROSS - Built with our famous Radian slim fit convertible design for a 3-across option only with Diono Radian combinations without compromising child or passenger comfort. Feel safe having your children secure in the backseat.
Graco Contender Slim Convertible Car Seat, West Point
Convertible car seat grows with your child from rear-facing harness 5-40 lb to forward-facing harness 22-65 lb. Slim car seat design saves space in your back seat. Compact and lightweight to easily transfer from car to car. Travel car seat is certified for aircraft use to help keep your child safe while flying. Graco ProtectPlus Engineered a combination of the most rigorous crash tests that helps to protect your child in frontal, side, rear rollover crashes.
Diono Radian 3RXT, 4-in-1 Convertible Car Seat, Rear and Forward Facing, Steel Core, 10 Years 1 Car Seat, Ultimate Safety and Protection, Slim Fit 3 Across, Black Jet
AWARD WINNING RADIAN ALL-IN-ONE CONVERTIBLE CAR SEAT - From infant to booster seat, rear and forward facing the radian 3RXT adapts as your child grows for 10 years of use 2.2 - 54 kg 5 - 120 lb. REAR FACING FOR LONGER - Designed for safe rear facing travel from 5 50 lb 2.3 - 22.7 kg complete with newborn travel high wedge to protect as they grow from baby, infant to toddler. ONE HAND EASY ADJUST 12 POSITION HEADREST - Creates a safe and comfortable fit for rear facing, forward facing and booster seat modes. STEEL REINFORCED FRAME - Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect. THE ORIGINAL RADIAN 3 ACROSS - Built with our famous Radian slim fit convertible design for a 3-across option only with Diono Radian combinations without compromising child or passenger comfort. Feel safe having your children secure in the backseat.
Chicco MyFit Harness + Booster Car Seat, Gardenia
BUILT TO GROW For extended use, the forward-facing Chicco MyFit harness booster car seat easily converts from 5-point harness for toddlers to belt-positioning booster for bigger kids.. HEAD AND TORSO PROTECTION Superior DuoGuard with a deep rigid shell and EPS energy-absorbing foam for head and body support creates two levels of side-impact protection. A steel-reinforced frame provides additional impact protection for parent peace of mind.. EASY TO INSTALL Premium LATCH connectors and LockSure belt-tightening system offer easy installation in either harness or seat belt mode while RideRight bubble levels and ReclineSure leveling system ensure a proper fit in the vehicle.. COMFORT FEATURES The high back booster accommodates your growing child with a 9-position headrest and a 4-position recline. The extra deep, contoured ErgoBoost seat with dual-density foam padding offers a more comfortable ride in both modes.. SPACE-SAVING FEATURE Two dishwasher-safe CupFolders with push-button removal fold away to save space when not use for a convenient travel booster seat..
Graco TriRide 3 in 1 Car Seat | 3 Modes of Use from Rear Facing to Highback Booster Car Seat, Clybourne
3-in-1 car seat grows with your child from rear-facing harness 5-40 lb to forward-facing harness 22-65 lb to highback booster 40-100 lb. Graco ProtectPlus Engineered a combination of the most rigorous crash tests that help to protect your child in frontal, side, rear rollover crashes. No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together in one motion. Choose the perfect headrest height from 10 positions to get the safest fit for your growing child. 6-position recline keeps your child comfy and helps for a better installation.
Baby Trend Trooper 3-in-1 Convertible Car Seat, Moondust (CV01C87B)
3 modes of use rear facing infant mode 4-18lbs, rear facing toddler mode 18-40lbs, and forward facing toddler mode 22-65lbs. Immediate right installation angle rear-facing recline flip foot allows for great installation angles with ease The built-in bubble level indicator helps find the correct angle. Fits three across at its widest, the Trooper is 16.75 Allowing it to fit 3 ACROSS in most vehicle. Shoulder crotch buckle adjustment 5-position shoulder height adjustment and 3- position crotch buckle for seat adjustment. Safe with head protection super deep side wings for better side impact protection.
Graco Tranzitions 3 in 1 Harness Booster Seat, Proof
3-in-1 harness booster helps protect your child, from toddler to youth. Grows with your child from forward-facing harness 22-65 pounds to highback booster 40-100 pounds to backless booster 40-100 pounds to continue to meet industry standards, we have increased the weight minimum from 30 to 40 pounds. No-rethread simply safe adjust harness system allows the headrest and harness to adjust together in one motion.Do not use bleach. Lightweight, portable seat is ideal for busy, active parents. One-hand, 8-position adjustable headrest grows with your child. 2 easy-to-clean cup holders keep your child's drinks and snacks close at hand. Open-loop belt guides help properly position your vehicles seat belt. Seat pad, body support, and harness covers are comfortable and machine washable. Graco ProtectPlus Engineered A combination of the most rigorous crash tests that helps to protect your little one in frontal, side, rear and rollover crashes. Meets or exceeds the child restraint criteria for a frontal crash test under the US FMVSS 213.
Diono Radian 3RX 3-in-1 Rear and Forward Facing Convertible Car Seat, Adjustable Head Support & Infant Insert, 10 Years 1 Car Seat Ultimate Safety and Protection, Slim Fit 3 Across, Jet Black
12 POSITION HEADREST - Creates a safe and comfortable fit for rear facing, forward facing and booster seat modes. INFANT HEAD SUPPORT LINER - Features padded support for added comfort. Simply remove as your infant transitions from rear-facing to forward facing booster seat. 10 YEARS ONE CAR SEAT - From rear-facing to forward facing Radian 3RX adapts as your child grows from birth to booster. Suitable from 5 - 120 lb 2.3 - 54 kg. REAR FACING FOR LONGER - Designed and engineered to keep your child rear-facing for as long as possible up to 50 lb 22.7 kg. STEEL REINFORCED FRAME - Mechanically engineered, reinforced steel core, made from automotive grade high strength steel to shield and protect.