Top 3 Best Car Seat For Big Babies That Provides Safety and Comfort 

 July 13, 2022

By  maipham

Baby car seats are designed to protect the baby's immature head, neck, and spine, help them learn to sit more firmly on long trips and protect them in the best way when facing an accident.

Are you looking for best car seat for big babies? Choosing a good car seat for your baby today is not easy for parents because there are numerous kinds of car seats and each child needs a car seat suitable for different weights and ages. 

Don't worry, you’re in the right place. We have compiled information, advice and reviews to give you the best look on which car seat to buy for your baby that is safest and most affordable today.

Here Are Our Top Picks For Best Car Seat For Big Babies

Best Car Seat For Big Babies

There are many types of car seats with different designs and colors. But we recommend the below 3 types of chairs including:

  • Graco Slimfit 3-in-1 car seat: Safe, comfortable and reasonable price
  • Diono Radian 3XRT: Luxurious, bring optimal safety and convenience
  • Maxi – Cosi Pria Max 3-in-1: Specially designed with many improvements to protect the child's maximum safety, providing optimal comfort

Types Of Car Seats For Babies

Best Car Seat For Big Babies

When choosing to buy a car seat for a child, what parents need to pay attention to the most is the child's weight and age. With each weight level, car seat manufacturers design their product models that are suitable for the baby's condition.

With European standards, baby car seats can be divided into the following 5 types:

  • Group 0 (for children under 1-year-old, weighing less than 10 kg): This is a group of children who cannot sit for a long time by themselves, so the car seat is the cradle attached to the back seat of the car. Besides, the car seat can be easily removed and carried, and some can even clip onto your stroller. 
  • Group 0+ (for children under 1.5 years old, weighing under 13 kg): Seats are mounted so that the child sits against the direction of movement of the vehicle, minimizing the risk of injury when an accident happens. The chair can be used as a portable cradle which is very convenient.
  • Group 1 (for children from 1 to 4 years old, weighing 8-18 kg): The special feature of this type is that the back of the chair can be adjusted, creating comfort for the child.
  • Group 2 (for children from 3 to 7 years old, weighing 15 - 25 kg): The seat is calculated according to the height of the child and the mode of using the seat belt in the car. Over time, the back of the chair can be removed, using only the seat surface.
  • Group 3 (for children from 6 to 10 years old, weighing from 22 to 36 kg): Baby is completely comfortable and safe with a car seat.

What To Look For In A Best Car Seat For Big Babies

When deciding to buy a good baby car seat, parents need to pay attention to the following things:

Best Car Seat For Big Babies

Suitable for baby's age, weight and body size

A baby car seat only works to ensure the safety of the baby when that seat is suitable for the child's age, weight and body size. Therefore, before deciding to buy a baby car seat, parents must know how much their baby weighs or her body size to choose the most suitable car seat.

Features of car seats

There are many product lines of baby seats from many different brands, so each product will have different features: 

  • Anti-shock or bounce: there will be car seats that focus on anti-shock or bounce or have seats that design the back to hug the body so as not to affect the baby's skeletal system. 
  • Multi-function car seat: If in the case of a small baby, you should buy a multi-function car seat that integrates many of the most optimal features of a car seat to help protect your baby best and can be used for a long time.


As mentioned above, there are many types of baby car seats with different features, so their prices will certainly differ more or less. Therefore, mothers need to carefully consider the needs and economic conditions of the family to choose the right product. The price of large children's seats usually ranges from $70 - $100. Some famous car seat brands like Graco, combi coccoro, the price can be up to $200 - $300. 

Convenience for mother and comfort for baby

The best baby seat also needs an easy-to-install design, because the right installation also contributes to ensuring your baby's safety in the car. 

Besides, when shopping for car seats, you can refer to car seats equipped with Eggshock or Eggshock α- a special material (Eggshock- sponge; Enggshock α- special clear gel) to help absorb and disperse the shocks and reduce vibrations to the baby's head during the journey. 

Additionally, parents should choose a car seat that uses 3-dimensional fabric material combined with ventilation foam to help quickly circulate air, reducing the contact temperature between the baby's body and the seat cushion.

Top 3 Best Car Seat For Big Babies

Here are top 3 best car seats for large babies that we highly recommend for parents: 

Best Car Seat For Big Babies

Graco SlimFit 3-in-1 Car Seat - The all-around best car seat for big babies

Graco car seat is a branded baby product from the US that was established in 1953. This car seat has a durable steel frame that can last up to 10 years. 

Before being sold on the market, this kind of car seats have undergone crash tests for rear, front, side and rollover crashes to ensure maximum safety for your children. On Amazon, the seat is rated 4.7 out of 5, many shoppers agree that the seat feels safe, reassuringly sturdy, with a really cushioned seat.

Additionally, Graco SlimFit 3-in-1 provides  four recline options and 10 headrest positions, providing a comfortable ride for your baby. This car seat can accommodate children up to about 45kg. The seat possesses a high back booster which is spacious and comfortable for children from 20-35kg. Besides, large kids can use this seat until they’re 9 years old.

Although it is a bit difficult to install this chair on the car because the installation diagram is quite lengthy and complicated. However, once installed, the chair will be firmly fixed in place, without any movement. The seat belt is threaded behind the seat cushion, ensuring it is secure and snug.

Graco Slimfit 3-in-1 car seats has the following outstanding features:

The design: Graco Slimfit 3-in-1 car seats have a fairly close design based on the observation of a mother's arms holding her child. The product is designed to be suitable for many children from birth to adults weighing 54.5kg can also use.

The materials: Graco Slimfit 3-in-1 car seat structure consists of the following main parts:

  • Frame: made of sturdy stainless steel, good bearing capacity to help support the baby firmly.
  • Outer fabric: made of soft, sweat-absorbent, breathable material.
  • The soft padding: helps the baby to lie comfortably without discomfort.
  • The outside parts of the frame: made of EPS material to help absorb the impact force and effectively ensure the safety of the baby.

What we like

  • Safety
  • Comfortableness
  • Suitability for big babies
  • Certainty

What we don't like

  • Although Graco Slimfit 3-in-1 car seat’s cost is commensurate with the safety and sustainability that this car seat brings, it is still quite high compared to other car seats.
  • This car seat does not have a rear metal divider so that parents cannot install a chest clip lock, preventing the child from getting out of its seat. This causes great inconvenience, making it impossible for parents to ensure that their children will sit still, especially while driving.

The Diono Radian 3RXT – A luxurious model with high-end safety

Diono Radian 3XRT is one of the most luxurious seats available today with high-class features and design. Diono Radian 3RXT is made with an alloy frame made of steel, which helps the car seat to be firm, maximum protection for the safety of the baby if there is a collision. 

The car seats include EPS foam for energy absorption and aluminum-reinforced side walls for added safety. The seat is also equipped with a head restraint and five-point harness in both forward and rear-facing modes, helping your baby stay in a safe position even in the event of a crash. 

The 5-point safety system (2 shoulders, 2 legs, abdomen) is carefully padded so as not to cause pain to the baby in the event of an accident as well as not creating friction on the baby's tender skin.

The Radian 3RXT car seat is designed for children from 25-55kg. Therefore, the seat will bring comfort and safety to children of large weight and height. This car seat also has a booster mode suitable for children between the ages of six and seven. At this time, the seat belt on the car is used to increase safety when traveling.

Radian 3RXT car seat offers convenience because it is easy to install and clean. The installation of this car seat is quite easy and does not have many lengthy and complicated stages. 

Besides, for cars with flatter car seats or those with raised cleavage, the seats recline better and include an angle adjuster. An improvement of this type of car seat is that it no longer has a ratchet system to tighten the belt. Now, parents just need to pull the adjustment strap to be able to adjust the seat to suit the child's position. 

As for cleaning, Diono Radian 3RXT makes it easy for parents to clean up as the car seat cover is removable. Parents can put the cover in a washing machine with mild detergent on a gentle cold water cycle.

To illustrate, this type of car seats has following outstanding features:

The design: Diono Radian 3XRT car seat is designed in a striking Black Camo or Platinum style, bringing elegance. Equipped seats include a convenient rear-seat arranger with 6 storage bags and 2 drink compartments. 

This car seat is designed with forward and rear facing convertible, suitable for children of all ages. When the seat is moved from the rear to the front, the reinforced aluminum headrest can be adjusted to one of 12 positions to ensure baby's safety. In addition, with its slim design, the seat will fit a wide range of vehicles without compromising the child's safety or comfort.

The materials: Diono Radian 3XRT car seat is made entirely of reinforced steel frame, mechanical, made from high-grade high-strength steel for cars, providing optimal safety for the baby.

What we like

  • Safety
  • Suitable for big babies
  • Convenience and comfortableness

What we don't like

  • Although the price of this car seat is commensurate with the quality it offers, it is still high for the average family

Maxi – Cosi Pria Max 3-in-1 car seat – most comfortable car seat for big babies

Maxi – Cosi Pria car seat is one of the types of seats that have been on the market for a long time. Maxi – Cosi Pria Max 3-in-1 car seat includes machine washable cushion and seat cover, infant positioning wedge and 3-position recline base. This car seat is equipped with removable seat cushions that can be removed without re-attaching the straps. 

The infant positioning wedge provides comfort and support and ensures that your baby is properly and comfortably seated. Seat pad and harness covers are both machine washable and dryer safe. 

Additionally, The Pria 3-in-1 utilizes the Quick-Fit Shoulder Harness that automatically adjusts to comfortably fit your child’s growing height. Additionally, the Pria 3-in-1 is also designed with an infant wedge pillow to help support and promote proper alignment when your child is in the car. It is wrapped in a machine washable cover and can be easily removed without removing the car seat.

Maxi – Cosi Pria Max 3-in-1 car seat patented GCell side impact protection built into the headrest to provide optimal protection for your child's head and neck. The harness comes with five easy-to-adjust headrest positions to create a comfortable and customized fit for your growing child.

Maxi – Cosi Pria Max 3-in-1 car seat is an upgraded type with more advanced features as follows:

The design: Maxi – Cosi Pria Max 3-in-1 car seat  is designed 3-in-1 convertible car seat system: converted from harnessed rear-facing, to harnessed forward-facing, and to booster mode. The front face will be suitable for large babies, weighing 20-30kg. Facing forward, your baby will have a 5 point safety harness with shoulder pads and a bottom buckle cover. This car seat utilizes the One-Click LATCH Connectors to make installation faster, easier, and safer. These connectors also ensure that you install the car seat securely and correctly. Besides, the Pria 3-in-1 comes with three recline angles to ensure that your child is seated at the safest and most comfortable angle. It’s also equipped with the QuickFit Shoulder Harness that automatically adjusts to your child's growing height.

The materials: Maxi – Cosi Pria Max 3-in-1 car seat meets FMVSS 213 standards and is certified for use in aircraft. Premium fabrics and cushions provide the ultimate in comfort for your child.

What we like

  • Comfortableness
  • Safety
  • Modern

What we don't like

  • Heavy and big, not suitable for small cars
  • Can only use a tether in a forward-facing position. Infant insert can make installing rear-facing somewhat challenging

Some notices when buying car seats for big babies

Best Car Seat For Big Babies
  • Parents should choose branded car seats, with safety certificates, with labels to prove the origin to avoid buying the wrong product for the baby.
  • You can choose to buy a car seat combined with a stroller, which can be disassembled to make a crib or stroller for the baby when getting off the car.
  • A good car seat for your baby will help keep your baby safe and comfortable during family outings by car. If you want to buy a good car seat for your baby, you need to keep the following things in mind:
  • To ensure the safety of the baby, when buying a car seat, it is necessary to determine the needs of use as well as the ability for the child to choose the right one according to the age and weight of the child.
  • When buying a car seat for your baby, you should choose seats with a combination of groups for long-term use as well as cost savings.
  • Parents should choose car seats with reputable brands and international standards, and should not choose car seats of unknown origin.
Best Car Seat For Big Babies

Above is information on the best seats for older children and tips for parents when buying car seats. 

There are many types of car seats with different designs and colors. But we recommend the above 3 types of chairs including Graco Slimfit 3-in-1; Diono Radian 3RXT and Maxi – Cosi Pria Max 3-in-1 because of the high quality and safety that it brings. Hope this article will provide you with useful information!


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