Cosco Finale DX 2-in-1 Review (2026): Best Budget Forward-Facing Booster

The Cosco Finale DX has been a go-to recommendation of mine for families who need multiple forward-facing seats without spending a fortune. At 18 inches wide and under $60, it’s one of the slimmest and cheapest combination booster seats you can buy, and the IIHS “Best Bet” booster rating confirms it provides a good belt fit for the kids who need it most. I’ve installed it three-across in a mid-size sedan with room to spare — something most booster seats can’t claim.

This review covers who the Finale DX works best for, its NHTSA ease-of-use ratings, specs, and how it compares to the Graco Atlas 65 — a similar 2-in-1 option at a higher price point.

Who is the Cosco Finale DX best for?

The Finale DX is built for budget-conscious families with kids who’ve outgrown their convertible car seat and need a forward-facing harness seat that transitions into a booster. Its 18-inch width makes it the best choice for three-across setups and carpooling families who need to maximize back-seat space. At just 11.5 pounds, it’s also easy to move between vehicles.

The harness mode covers 30-65 lbs (ages 1+), and the belt-positioning booster mode extends to 100 lbs. The IIHS gave it “Best Bet Booster” status, meaning it provides a good seat belt fit for typical kids aged 4-8 in most vehicles. However, the padding is thinner than pricier seats, the harness requires rethreading for height adjustment, and it starts at 30 lbs forward-facing only — there’s no rear-facing mode. If you need a seat that starts from birth, look at the Cosco Apt 50 or Cosco Mighty Fit 65 instead.

Pros and cons

Pros

• IIHS “Best Bet Booster” rating — confirmed good belt fit for ages 4-8 in most vehicles
• Only 18 inches wide — fits three-across in most vehicles
• Two modes: 5-point harness (30-65 lbs) and belt-positioning booster (40-100 lbs)
• Budget-friendly price under $60
• Lightweight at 11.5 lbs — easy to transfer between cars
• LATCH compatible in harness mode
• FAA approved in harness mode for air travel
• Fabric is washer and dryer safe
• Reversible cup holder attaches to either side (dishwasher-safe)
• 10-year expiration — excellent longevity for a budget seat
• Made in Columbus, Indiana by a 70+ year manufacturer

Cons

• Forward-facing only — no rear-facing mode
• Starts at 30 lbs, so it’s not suitable for smaller toddlers
• Harness requires rethreading for height adjustment
• Padding is thinner than competitors — some kids find it uncomfortable on long rides
• Crotch buckle can interfere with seat belt or LATCH belt during installation (NHTSA noted)
• Must be seat-belted in when not in use during booster mode (won’t stay in place unoccupied)
• Only one cup holder included

Safety ratings

NHTSA ease-of-use ratings for the Cosco Finale DX:

• Labels: 3/5 stars — no full picture of properly restrained child, no supplemental sizing info
• Instructions: 5/5 stars
• Securing the child: 4/5 stars — harness requires rethreading
• Installation features: 3/5 stars — possible crotch buckle interference with belt/LATCH
• Overall ease of use: 4/5 stars

The 5-star instructions rating is excellent for a budget seat. The IIHS “Best Bet Booster” designation is arguably more meaningful than the NHTSA ratings for a booster seat, as it specifically evaluates how well the seat positions the vehicle’s seat belt on a child’s body. The Finale DX meets or exceeds all federal and JPMA safety standards.

The Finale DX expires 10 years from manufacture. Check the back of the seat shell for the date.

Specifications

Key features

18-inch slim profile. At just 18 inches wide, the Finale DX is one of the narrowest combination booster seats available. This makes three-across installation realistic in most mid-size and larger vehicles — a genuine advantage for families with three young children or regular carpoolers.

IIHS Best Bet Booster. The Insurance Institute for Highway Safety independently evaluates how well booster seats position the vehicle’s lap and shoulder belt on a child’s body. The “Best Bet” rating means the Finale DX provides a good belt fit for typical kids in most vehicles — the most meaningful safety endorsement a booster can receive.

Dual-mode versatility. The 5-point harness mode covers the toddler years (30-65 lbs), and the belt-positioning booster mode takes your child through elementary school (40-100 lbs). With a 10-year expiration, this single seat can realistically cover your child from age 1 through age 8-10.

Travel-friendly design. At 11.5 pounds and FAA approved in harness mode, the Finale DX works well as a travel seat. It’s light enough to carry through an airport and slim enough to fit in most airplane seats.

Installation tips

• In harness mode, use LATCH installation — be aware the crotch buckle can get in the way of the LATCH belt path, so route carefully
• Some minor assembly is required out of the box — follow the illustrated manual
• In booster mode, the seat must be buckled in with the vehicle seat belt even when your child isn’t in it — it won’t stay stable otherwise
• The harness stores inside the seat when converting to booster mode, keeping everything contained
• Not all children within the stated weight/height ranges will fit comfortably — the manufacturer recommends testing the fit before committing

Manual available at: Cosco Finale DX manual

Cosco Finale DX vs. Graco Atlas 65

Both are solid 2-in-1 forward-facing options with IIHS Best Bet status. The Graco Atlas starts at a lower weight (22 lbs vs. 30 lbs), offers two cup holders, and has a dedicated harness storage compartment. The Cosco Finale DX costs significantly less, is narrower for three-across use, and has dryer-safe fabric. If budget and three-across matter, go Finale. If you need to harness a smaller toddler and want the extra cup holder, the Atlas is worth the premium.

What’s included

The Finale DX comes with the seat and a reversible dishwasher-safe cup holder that attaches to either side.

Frequently asked questions

Can I use the Cosco Finale DX rear-facing?
No, the Finale DX is forward-facing only. It starts at 30 lbs in harness mode. For a rear-facing budget option, see the Cosco Apt 50 (rear and forward-facing from 5 lbs).

Can I fit three Finale DX seats across?
Yes, at 18 inches wide it’s one of the best options for three-across installation. It fits in most mid-size sedans, SUVs, and minivans.

Is the Cosco Finale DX safe enough for my child?
Yes. It meets all federal safety standards and has the IIHS “Best Bet” booster rating, which means it provides a good belt fit. Every car seat sold in the U.S. passes the same crash tests regardless of price.

When should I switch from harness to booster mode?
Keep your child in the 5-point harness as long as possible — ideally until they reach 65 lbs or 49 inches. The harness provides better crash protection than a seat belt. Only switch to booster mode when your child exceeds the harness limits.

Can I take the Finale DX on an airplane?
Yes, it’s FAA approved in harness mode. At 11.5 lbs, it’s manageable for air travel.

Our verdict

The Cosco Finale DX is the best budget combination booster for families who need an affordable, slim forward-facing seat. The IIHS Best Bet rating, 18-inch width, and under-$60 price make it hard to beat for three-across setups and cost-conscious parents. The main trade-offs are thinner padding and a rethread harness, but for the price, it delivers genuine safety and versatility.

For more car seat options at every budget, see our best convertible car seats guide. For the safest brands overall, check our safest car seat brands comparison.