Best Diono Booster Car Seats: 6 Models Compared

Quick picks

Our 6 picks

1 Best overall

Diono Connect3 R Slim 2-in-1 Booster

Best for: Families fitting three seats in mid-sized cars

Booster Type

2-in-1 High Back

Weight Range

40-120 lbs.

Headrest Positions

11

Cup Holders

Removable cup holder

Target Audience

Kids

Features

Lightweight, Highback Booster

View on Amazon: Diono Connect3 R Slim 2-in-1 Booster Affiliate link

The Diono Connect3 R is a 2-in-1 high back booster designed for families needing to fit three children in mid-sized sedans and SUVs. At 16.3 inches wide, it utilizes Diono’s slim-fit design to maximize interior space. It supports children from 40 to 120 lbs and features an 11-position headrest. The seat includes a removable cup holder and a reclining backrest for comfort during travel.

Pros

• Slim 16.3-inch width fits 3-across in many vehicles
• 11-position adjustable headrest for growing children
• Converts from high back to backless booster
• Removable cup holder nests between seats
• Ventilated head and backrest design for airflow

Cons

• No integrated 5-point harness for younger toddlers
• Weight limit starts at 40 lbs
• No mention of machine-washable cover

Good fit if

• You need to install three seats side-by-side
• Your child is already past the harness stage
• You want a seat that converts to backless

Skip if

• You need a seat for children under 40 lbs
• You require a built-in 5-point harness
• You prefer a backless-only booster

Verdict: Diono Connect3 R High Back Booster offers a slim profile for three-across installs and converts to backless use, making it ideal for older kids in smaller vehicles.

2 Also great

Diono Cambria 2 XL 2-in-1 Booster

Best for: Families needing built-in snack and drink storage

Booster Type

2-in-1 High-Back to Backless

Weight Range

40 - 120 lb

Harness System

Belt Positioning

LATCH Type

Dual Latch Connectors

Headrest Positions

6

Cup Holders

Dual integrated

View on Amazon: Diono Cambria 2 XL 2-in-1 Booster Affiliate link

The Diono Cambria 2 XL is a 2-in-1 belt-positioning booster seat designed for children weighing 40 to 120 pounds. It features a 7-position headrest and dual latch connectors for secure installation. The seat includes built-in retractable cup holders and a snack tray. Its XL wide design offers padded armrests and deep cushioning. This model suits families needing a long-lasting booster with integrated storage and comfort features.

Pros

• Dual Latch Connectors for secure installation
• 7-position headrest adjusts to child's height
• Built-in retractable cup holders and snack tray
• XL wide design with padded armrests
• Machine-washable contoured fabrics

Cons

• Heavier at 12.8 pounds compared to lighter competitors
• Wider footprint at 20.1 inches may limit 3-across fit
• No mention of side impact protection layers in specs

Good fit if

• You need a booster with built-in storage for snacks and drinks
• You prefer a seat with padded armrests for comfort
• You want a 2-in-1 seat that converts to backless

Skip if

• You need to fit three seats across in the back row
• You prioritize a lightweight seat under 10 pounds
• You require a seat with explicit side impact protection layers listed

Verdict: The Diono Cambria 2 XL fits families who value built-in storage and wide comfort for growing children. It is a practical choice for those who do not need to maximize rear seat width.

3 Also great

Diono Everett NXT Rigid LATCH Booster

Best for: Families needing a slim, long-lasting high back booster

Booster Type

High Back

Weight Range

40 - 120 lb

LATCH Type

Rigid LATCH

Headrest Positions

7

Features

Lightweight, Latch Connectors, Highback Booster

Color

Black

View on Amazon: Diono Everett NXT Rigid LATCH Booster Affiliate link

The Diono Everett NXT is a high back booster designed for children weighing 40 to 120 pounds. It features rigid LATCH connectors for secure installation and a 7-position adjustable headrest. The seat measures 18.5 inches wide and weighs 11.1 pounds. Its slim profile supports three-across seating in many vehicles. This model offers eight years of use with machine-washable padding for long-term comfort.

Pros

• Rigid LATCH connectors for secure installation
• Slim 18.5-inch width fits three across
• 7-position headrest adjusts as child grows
• Machine-washable padded fabric for easy care

Cons

• Higher weight at 11.1 pounds compared to lighter rivals
• Single unit sold, not a pack of two
• Open loop belt guides require manual buckle checking

Good fit if

• You need a durable booster for children up to 120 lb
• You want rigid LATCH installation for stability
• You require a slim seat for wider vehicles

Skip if

• You prefer a backless booster design
• You need a lighter seat under 10 pounds
• You want a two-pack for multiple children

Verdict: The Diono Everett NXT High Back Booster provides a sturdy, slim profile with rigid LATCH connectors. It suits families needing a long-lasting seat for children up to 120 lb who prioritize secure installation over lightweight portability.

4 Best premium

Diono Connect3 RXT Backless Booster 2-Pack

Best for: Families needing three-across seating in one vehicle

Booster Type

Backless

Weight Range

40-120 lbs.

LATCH Type

Easy-release strap connectors

Cup Holders

Two removable cup holders

Target Audience

Kids

Features

Lightweight, Latch Connectors

View on Amazon: Diono Connect3 RXT Backless Booster 2-Pack Affiliate link

This Diono Connect3 RXT is a backless booster sold as a pack of two. It measures 9.1 inches wide, allowing for a slim fit across three seats in many mid-sized vehicles. The seats accommodate children from 40 to 120 pounds. It includes two removable cup holders and uses easy-release LATCH straps for secure installation. This option suits families needing multiple seats for growing children.

Pros

• Slim 9.1-inch width fits three-across in many vehicles
• Includes two removable cup holders
• Easy-release LATCH strap connectors
• Supports children up to 120 pounds

Cons

• Backless design offers less head and side-impact protection than high-back models
• Pack of two limits flexibility for single-seat needs
• No adjustable headrest or harness system

Good fit if

• You need to install three boosters side-by-side in one vehicle
• You want a lightweight option that fits in smaller cars
• You need multiple seats for several children

Skip if

• You require a high-back booster for added side-impact protection
• You only need a single seat for one child
• You prefer a seat with an adjustable headrest

Verdict: Diono Connect3 RXT Backless Booster 2-Pack provides a space-saving solution for families with multiple children. Its slim width and high weight capacity make it ideal for vehicles with limited rear seat space.

5 Also great

Diono Connect3 RXT Slim 2-in-1 Booster

Best for: Slim three-across installations with recline

Booster Type

2-in-1 High Back

Weight Range

40-120 lbs.

LATCH Type

Easy-release strap connectors

Headrest Positions

11

Target Audience

Kids

Features

Lightweight, Latch Connectors, Highback Booster

View on Amazon: Diono Connect3 RXT Slim 2-in-1 Booster Affiliate link

The Diono Connect3 RXT is a 2-in-1 high back booster designed for slim-fit installation. It measures 16.3 inches wide, allowing three across in many mid-sized vehicles. The unit features 11 headrest positions and a 2-position recline. It supports children from 40 to 120 lbs. The design includes EasyPath lap belt guides and a carry handle for easy transport between cars.

Pros

• Slim 16.3-inch width fits three across
• 11 adjustable headrest positions
• 2-position reclining backrest for comfort
• Easy-release LATCH connectors with carry handle
• Supports 40 to 120 lbs weight range

Cons

• Heavier build due to rigid LATCH system
• No backless mode conversion listed in specs
• Limited to 120 lbs maximum weight limit

Good fit if

• You need a slim booster for three-across seating
• You want adjustable headrest height for growing kids
• You prefer a high-back design with recline

Skip if

• You require a backless-only configuration
• You need a booster for children under 40 lbs
• You prioritize the lightest possible seat weight

Verdict: The Diono Connect3 RXT High Back Booster offers a slim 16.3-inch profile with 11 headrest positions. It suits families needing a durable high-back seat that fits three across in mid-sized vehicles.

6 Best budget

Diono Solana 2 XL Backless Booster 2-Pack

Best for: families needing two lightweight backless boosters

Booster Type

Backless

Weight Range

40 - 120 lb

Harness System

Belt-positioning

LATCH Type

Dual LATCH connectors

Cup Holders

Two built-in retractable

Features

Lightweight, Latch Connectors

View on Amazon: Diono Solana 2 XL Backless Booster 2-Pack Affiliate link

The Diono Solana 2 XL is a backless booster sold as a two-pack. It supports children from 40 to 120 pounds for eight years. Each seat weighs only six pounds and measures 18.5 inches wide. You get dual latch connectors for secure installation. Built-in retractable cup holders and snack trays add convenience. The padded design includes removable, machine-washable covers.

Pros

• Supports 40 to 120 lb weight range
• Includes dual latch connectors
• Weighs only 6 pounds per seat
• Has built-in retractable cup holders
• Machine-washable padded covers

Cons

• Backless design offers less side impact protection
• No headrest for growing children
• Sold only as a two-pack

Good fit if

• You need two seats for multiple children
• You prioritize lightweight, portable boosters
• You want built-in storage for snacks

Skip if

• You require a high-back booster for side protection
• You need a single seat purchase
• You want adjustable headrest height

Verdict: The Diono Solana 2 XL 2-Pack fits families who need two lightweight, backless boosters for older children. It is a practical option for parents who value easy installation and storage features over high-back support.

Specifications side by side

Diono Booster Car Seats Compared

Diono offers distinct booster categories based on width and configuration. The Connect3 R Slim and Connect3 RXT models feature narrow profiles around 16.3 inches wide. These seats suit families needing three-across installations in mid-sized vehicles. The Connect3 RXT also provides eleven headrest positions for growing children.

For wider comfort or specific needs, the Cambria 2 XL includes built-in storage. The Everett NXT Rigid LATCH offers a sturdy high-back option with rigid connectors. The Solana 2 XL 2-Pack provides lightweight backless boosters. You can choose based on whether you prioritize slim width, storage capacity, or lightweight portability for older kids.

Where Diono Fits Your Needs

Diono’s range spans from ultra-slim 9.1-inch backless boosters to wider 20.1-inch high-back models. You can choose between lightweight, portable units for easy transport and heavier, rigid LATCH systems for maximum stability. The lineup includes versatile 2-in-1 seats that convert from high-back to backless, as well as dedicated backless options for older children. Notably, Diono does not offer infant or convertible car seats in this booster category. If you need a seat for a newborn, this brand’s current lineup does not apply. Focus on width and weight capacity to match your vehicle and child’s size.

How to Choose the Right Diono Booster

1. Check Seat Width for Fits

   Measure your vehicle's rear seat width before buying. The Diono Connect3 R Slim measures 16.3 inches wide, allowing three seats across in mid-sized cars. If you need more space, the Diono Cambria 2 XL is 20.1 inches wide. Narrow seats like the Connect3 RXT at 9.1 inches wide save room but offer less side support. Compare these dimensions to your car's interior to ensure a proper fit without crowding other passengers.

2. Decide Between High Back and Backless

   Choose high-back boosters for side-impact protection and head support. The Diono Everett NXT provides a sturdy high-back design with rigid LATCH connectors. Backless boosters like the Diono Solana 2 XL are lighter and easier to store. They are best for older children who fit the vehicle seat belt correctly. Consider your child's size and your vehicle's headrests to determine which style offers the necessary safety and comfort for daily use.

3. Evaluate Weight for Portability

   Consider how often you move the seat between vehicles. The Diono Solana 2 XL weighs only 6 pounds, making it easy to carry. Heavier options like the Diono Cambria 2 XL weigh 12.8 pounds and offer more stability. The Diono Everett NXT is 11.1 pounds and uses rigid LATCH for a secure fit. If you travel frequently, lighter models are easier to handle. If you leave the seat installed, weight matters less than installation security.

4. Look for Storage Features

   Some Diono boosters include built-in storage for snacks and drinks. The Diono Cambria 2 XL features this practical addition for families on the go. Other models, like the Connect3 series, focus on slim profiles and lack these compartments. Decide if you need extra space for items or prefer a simpler design. Storage features add bulk and weight, so weigh this convenience against the need for a compact seat that fits easily in tight car spaces.

5. Verify Installation Method Compatibility

   Check if your vehicle supports rigid LATCH or belt-only installation. The Diono Everett NXT uses rigid LATCH connectors for a secure, tool-free setup. The Diono Connect3 RXT also includes LATCH connectors for easy installation. Some backless models rely on vehicle seat belts. Ensure your car has the necessary anchors or that you are comfortable using the seat belt correctly. Proper installation is critical for safety, so match the seat's method to your vehicle's capabilities.

Frequently asked questions

See also

• best strollers under 150
• best strollers under 200