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Graco Tranzitions 3-in-1 Harness Booster Car Seat, Proof, Black

4.5 stars out of 2331 reviews
(4.5)|
2,331 ratings
Graco Tranzitions 3-in-1 Harness Booster Car Seat, Proof, BlackGraco Tranzitions 3 in 1 Harness Booster Car Seat ProofGraco Tranzitions 3 in 1 Harness Booster Car Seat Marley
Actual Color:Proof
Marley, $149.00
selected, Proof, $149.90

Key item features

  • Graco Tranzitions 3-in-1 Harness Booster Car Seat, Proof, Black
  • 3-in-1 harness booster helps protect your child, from toddler to youth
  • Grows with your child from forward-facing harness (26.5-65 lb) to highback booster (40-100 lb*) to backless booster (40-100 lb) *To continue to meet industry standards, we have increased the weight minimum from 30 to 40 lb
  • No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together in one motion
  • Lightweight, portable seat is ideal for busy, active parents
  • One-hand, 9-position adjustable headrest grows with your child
  • Integrated, rotaing holders help keep your child's drink close
  • Open-loop belt guides help properly position your vehicle’s seat belt
  • Seat pad and harness covers are comfortable and machine washable
  • Graco ProtectPlus Engineered: a combination of the most rigorous crash tests that helps to protect your little one in frontal, side, rear & rollover crashes
  • Side-impact tested according to FMVSS 213a with the built-in 5-point harness system
Current price is $149.90
Price when purchased online
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  • Free 90-day returns
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Comparison Chart:
Age GroupInfantGraco Tranzitions 3-in-1 Harness Booster Car Seat, Proof, BlackChildBaby Trend Hybrid SI Desert Grey 3-in-1 Combination Booster Car SeatToddlerCosco Kids™ Easy Elite Slim All-in-One Convertible Car Seat, Grey Glyphs, Infant & Toddler, UnisexInfantSafety 1st Grow and Go Sprint All-in-One Convertible Car Seat, Black Beauty IIChildBaby Trend Trooper Slim 3-in-1 Convertible Car Seat - Desert TanToddlerSafety 1ˢᵗ® TriFit All-in-One Convertible Car Seat , Borderline, Infant & Toddler, UnisexToddlerCosco Kids Scenera Extend Infant & Toddler Convertible Car Seat, Moonlit Night, BlackInfantGraco TrioGrow SnugLock 3-in-1 Car Seat, Warren, BlackToddlerGraco TurboBooster 2.0 Highback Booster Seat, Declan, GreyInfantGraco SlimFit LX 3-in-1 Car Seat, Shaw, Grey
Child Car Seat StyleHigh-Back Booster Car SeatsGraco Tranzitions 3-in-1 Harness Booster Car Seat, Proof, BlackHigh-Back Booster Car SeatsBaby Trend Hybrid SI Desert Grey 3-in-1 Combination Booster Car SeatConvertible Car SeatsCosco Kids™ Easy Elite Slim All-in-One Convertible Car Seat, Grey Glyphs, Infant & Toddler, UnisexConvertible Car SeatsSafety 1st Grow and Go Sprint All-in-One Convertible Car Seat, Black Beauty IIConvertible Car SeatsBaby Trend Trooper Slim 3-in-1 Convertible Car Seat - Desert TanConvertible Car SeatsSafety 1ˢᵗ® TriFit All-in-One Convertible Car Seat , Borderline, Infant & Toddler, UnisexConvertible Car SeatsCosco Kids Scenera Extend Infant & Toddler Convertible Car Seat, Moonlit Night, BlackConvertible Car SeatsGraco TrioGrow SnugLock 3-in-1 Car Seat, Warren, BlackHigh-Back Booster Car SeatsGraco TurboBooster 2.0 Highback Booster Seat, Declan, GreyConvertible Car SeatsGraco SlimFit LX 3-in-1 Car Seat, Shaw, Grey
ColorProofGraco Tranzitions 3-in-1 Harness Booster Car Seat, Proof, BlackDesert GreyBaby Trend Hybrid SI Desert Grey 3-in-1 Combination Booster Car SeatGrey GlyphsCosco Kids™ Easy Elite Slim All-in-One Convertible Car Seat, Grey Glyphs, Infant & Toddler, UnisexBlack Beauty IISafety 1st Grow and Go Sprint All-in-One Convertible Car Seat, Black Beauty IIDesert TanBaby Trend Trooper Slim 3-in-1 Convertible Car Seat - Desert TanBorderlineSafety 1ˢᵗ® TriFit All-in-One Convertible Car Seat , Borderline, Infant & Toddler, UnisexMoonlit NightCosco Kids Scenera Extend Infant & Toddler Convertible Car Seat, Moonlit Night, BlackWarrenGraco TrioGrow SnugLock 3-in-1 Car Seat, Warren, BlackDeclanGraco TurboBooster 2.0 Highback Booster Seat, Declan, GreyShawGraco SlimFit LX 3-in-1 Car Seat, Shaw, Grey
Car Seat Facing DirectionForward FacingGraco Tranzitions 3-in-1 Harness Booster Car Seat, Proof, BlackForward FacingBaby Trend Hybrid SI Desert Grey 3-in-1 Combination Booster Car SeatConvertibleCosco Kids™ Easy Elite Slim All-in-One Convertible Car Seat, Grey Glyphs, Infant & Toddler, UnisexConvertibleSafety 1st Grow and Go Sprint All-in-One Convertible Car Seat, Black Beauty IIForward FacingBaby Trend Trooper Slim 3-in-1 Convertible Car Seat - Desert TanConvertibleSafety 1ˢᵗ® TriFit All-in-One Convertible Car Seat , Borderline, Infant & Toddler, UnisexConvertibleCosco Kids Scenera Extend Infant & Toddler Convertible Car Seat, Moonlit Night, BlackConvertibleGraco TrioGrow SnugLock 3-in-1 Car Seat, Warren, BlackForward FacingGraco TurboBooster 2.0 Highback Booster Seat, Declan, GreyConvertibleGraco SlimFit LX 3-in-1 Car Seat, Shaw, Grey
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Customer ratings & reviews

4.5 out of 5 stars
stars2,331 ratings947 reviews
How item rating is calculated
  1. 5 stars77% (1,799)
  2. 4 stars10% (243)
  3. 3 stars3% (80)
  4. 2 stars2% (43)
  5. 1 star7% (166)

Reviews summary

Pros
  • : Provides additional cushioning for kids during car rides.
  • : Seat fits well in various vehicles.
  • : Offers good value at this cost.
  • : Allows for different height and position settings without rethreading or removal.
  • : Features a secure harness for added protection.
Cons
  • : Installation can be tricky and may not fit securely.
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Showing 1-3 of 947 reviews

Jul 19, 2025
anonymous
Item details
Color: Marley
5 out of 5 stars review

Verified Purchase

Perfect for Transition

This transition booster seat is perfect for my four-year-old girl, who is among the shorter spectrum (around 95cm). The normal booster would prevent her from sleeping in a comfortable position, but this one is perfect for her height. It is also much easier for her to get in herself. The 3-in-1 harness is also a great feature to ensure the kid's safety. I would definitely recommend this product to families.

Helpful?449UHFIEQMDU5959693583
Oct 6, 2025
Gaby R
5 out of 5 stars review

Seller Verified Purchase

Amazing!

[This review was collected as part of a promotion.] I was very nervous at first since my toddler is pretty tall, but this car seat was WAY better than her original Chico she had. I'm very happy and please and my toddler LOVES it! Very easy to anchor down and light. Very pleased with my purchase

Review from gracobaby.com
Helpful?449UHFIEQMDU5959693583
Oct 25, 2025
Evie
Item details
Color: Marley
5 out of 5 stars review

Verified Purchase

Daughter loves it!

Got this car seat for my 5 year old daughter and she loves it! She says it is comfortable and she likes the cup holders. She can do the buckles herself, which is a plus! She loved the purple and hasn't complained about anything feeling uncomfortable. It was recently put to the test on a road trip and she rode very pleasantly and even napped. I would buy it again for my other child as well when he gets big enough.

Helpful?449UHFIEQMDU5959693583