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Cosco Kids Finale DX 2-in-1 Booster Car Seat, vs Diono Solana, No Latch, Pack of 2 Backless Booster

Updated August 2026 — Cosco Kids Finale DX 2-in-1 Booster Car Seat, wins on versatility and safety, Diono Solana, No Latch, Pack of 2 Backless Booster wins on value.

The Cosco Kids Finale DX offers more features and versatility, making it a better choice for families with younger children, while the Diono Solana is a budget-friendly option for older kids.

Why Cosco Kids Finale DX 2-in-1 Booster Car Seat, is better

Versatility

2-in-1 design for younger and older kids

Safety

Includes a 5-point harness for younger children

Space Efficiency

Fits three across the back seat

Why Diono Solana, No Latch, Pack of 2 Backless Booster is better

Price

More economical at $54.99

Weight

Lightweight and easy to transport

Pack Size

Includes two seats in a pack

Overall score

Cosco Kids Finale DX 2-in-1 Booster Car Seat,
85
Diono Solana, No Latch, Pack of 2 Backless Booster
70

Specifications

SpecCosco Kids Finale DX 2-in-1 Booster Car Seat,Diono Solana, No Latch, Pack of 2 Backless Booster
Harness Type5-pointShoulder belt
Washable CoversYesYes
Max Weight100 lbs120 lbs
Design2-in-1Backless
Cup Holder TypeRemovableBuilt-in

Dimension comparison

Cosco Kids Finale DX 2-in-1 Booster Car Seat,Diono Solana, No Latch, Pack of 2 Backless Booster

Overview of the Cosco Kids Finale DX and Diono Solana

The Cosco Kids Finale DX is priced at $87.98, while the Diono Solana is more budget-friendly at $54.99, making it about 37% cheaper. Both products are designed to keep children safe while traveling, but they cater to slightly different needs and preferences. The Cosco Kids Finale DX offers a 2-in-1 functionality, transitioning from a forward-facing toddler car seat to a belt-positioning booster, while the Diono Solana is a pack of two backless booster seats aimed at older children.

Design and Usability

The Cosco Kids Finale DX is designed for children weighing between 40-100 lbs and features a forward-facing harness booster mode for younger kids and a belt-positioning booster for older ones. Its lightweight construction makes it ideal for families on the go, allowing easy transfer between vehicles. The Diono Solana, on the other hand, is a backless booster that supports children from 40-120 lbs, making it suitable for older kids as they transition to adult-sized seats. With its lightweight design, the Solana is also easy to transport, but it lacks the harness booster feature of the Cosco model.

Safety Features

Safety is paramount in child car seats, and both the Cosco Kids Finale DX and Diono Solana meet or exceed federal safety standards. The Cosco Kids Finale DX includes a 5-point safety harness for younger children, providing an extra layer of security for those in the 40-65 lbs range. In contrast, the Diono Solana utilizes a shoulder belt positioner to ensure proper seat belt alignment for older children. This distinction means that parents may prefer the Cosco model for younger kids who require more restraint, while the Diono model is tailored to those who have outgrown harness systems.

Comfort and Cleanliness

The Cosco Kids Finale DX features a removable, machine-washable seat pad, making it easy for parents to maintain cleanliness, especially in the event of spills or messes. Additionally, it includes removable cup holders, which are dishwasher-safe, adding convenience during travel. The Diono Solana also emphasizes comfort with its contoured premium soft fabrics and layered foam padding, and its covers are machine washable as well. However, as a backless booster, it may provide less overall body support compared to the fully featured Cosco Kids Finale DX.

Space Efficiency

If space is a concern, the Cosco Kids Finale DX shines with its narrow design, fitting three seats across the back of most vehicles. This feature is particularly advantageous for families with multiple children in car seats or those who frequently carpool. The Diono Solana, while lightweight and easy to store, does not offer the same space-saving benefits due to its backless design, which may require more room when accommodating multiple seats.

Price Comparison

At $54.99, the Diono Solana is the more economical choice compared to the Cosco Kids Finale DX, which retails for $87.98. This price difference of about $33 translates to a 37% savings when opting for the Diono model. However, it's essential to consider that the Cosco model offers more features, including a forward-facing harness option, which may justify its higher price for some families.

Additional Features

The Cosco Kids Finale DX includes features such as a dishwasher-safe cup holder and a design that fits three across the back seat, making it highly functional for larger families. Conversely, the Diono Solana comes with dual built-in elastic cup holders, enhancing convenience for snacks and drinks on the go. While both models offer unique features, the choice may depend on whether a family prioritizes versatility or simplicity in their booster seat.

Which should you buy?

Choosing between the Cosco Kids Finale DX and the Diono Solana ultimately depends on your child’s age, weight, and your family’s travel needs. The Cosco Kids Finale DX stands out for its versatile 2-in-1 design, safety features for younger children, and space efficiency, making it a solid choice for families with toddlers transitioning to older kids. However, if you're looking for a more budget-friendly option for older children, the Diono Solana offers excellent value with its dual-pack design and lightweight build. Consider your specific requirements and preferences before making a decision.