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Cosco Kids Pronto Trend Belt-Positioning Toddler Booster Car Seat, Sonic Diamonds, Black

4.4 stars out of 2121 reviews
(4.4)|
2,121 ratings
Cosco Kids Pronto Trend Belt-Positioning Toddler Booster Car Seat, Sonic Diamonds, BlackCosco Kids Pronto Trend Belt Positioning Booster Car Seat Sonic Diamonds Toddler UnisexCosco Kids Pronto Trend Belt Positioning Booster Car Seat Spindrift Toddler UnisexCosco Kids Pronto Trend Belt Positioning Booster Car Seat Violet Diamonds Toddler Unisex3 pack Cosco Kids Pronto Trend Belt Positioning Booster Car Seat Sonic Diamonds Toddler Unisex
Actual Color:Sonic Diamonds
Purple, $54.87
selected, Sonic Diamonds, $54.87
Spindrift, $54.87
Pack Size:Single

Key item features

  • Belt-positioning booster: 40–100 lbs.
  • 2 seats in 1: easily converts to a backless booster
  • Washable seat pad
  • Adjustable headrest grows with your child
  • Integrated slide-out cup holder
  • Shoulder belt guides
  • Exceeds federal safety standards
  • Headrest pillow for additional comfort
Current price is $54.87
Price when purchased online
  • Free shipping
  • Free 90-day returns
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Customer ratings & reviews

4.4 out of 5 stars
stars2,121 ratings489 reviews
How item rating is calculated
  1. 5 stars72% (1,526)
  2. 4 stars11% (232)
  3. 3 stars6% (123)
  4. 2 stars4% (76)
  5. 1 star8% (164)

Reviews summary

Pros
  • : Setup is fast and straightforward in vehicles.
  • : Offers budget-friendly booster car seat option.
  • : Provides extra support and padding for a ride.
  • : Provides optimal safety with belt placement.
Neutral
  • : Can be smooth, but sometimes stiff or finicky.
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Showing 1-3 of 489 reviews

Nov 11, 2025
Christin
Item details
Color: Sonic Diamonds
Multipack quantity: 1
3 out of 5 stars review

Verified Purchase

Booster seems safer than car seat, still uncomfy

I bought the car seat just for a quick one time use on Halloween night while my car was in the shop , and it did the job. But I would not recommend for a daily car seat. While it is VERY lightweight and very easy to install , the car seat itself just didn't seem stable enough to offer much protection for a child. And also the padding seems quite thin. Would definitely be uncomfortable for long rides or daily usage. Not bad for a spare or quick short term replacement though I guess. The booster seat function seems far more useful, and safe, than being used as a car seat.

Helpful?5UU2IMOBEFQC2910852772
Apr 11, 2025
London
Top Reviewer
Item details
Color: Sonic Diamonds
Multipack quantity: 1
3 out of 5 stars review

Verified Purchase

More cushion is necessary 100%!!

It's a really good car seat just needs more cushion on the seat.. why would you want your child to sit in this when traveling as your child's bottom will be so uncomfortable! I added so much more cushion to the seat. Please start putting cushion to the seat area! Thanks

Helpful?5UU2IMOBEFQC2910852772
reply from DorelJuvenileSupport

Thanks for your review! We would like to express our sincerest apologies for the cushion's insufficient support for your needs. We greatly appreciate your perspective.

Feb 15, 2026
Mike
Item details
Color: Sonic Diamonds
Multipack quantity: 1
2 out of 5 stars review

Verified Purchase

the back rest is very lose overall is an ok product for the price but one thing is missing that I didn't look for hard enough. the actual booster seat does not have the bottom seat belts that click onto the vehicles seat so that the boosters seat does not slide around, would have liked for the this one to have had that plus I thought it was a mandatory thing for child seat period.

Helpful?5UU2IMOBEFQC2910852772