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10 bestHarmony Booster Car Seatsof December 2025

112M consumers helped this year.

1

Maxi-Cosi Titan Car Booster Seat, 9‑36 kg, 9 Months-12 Years, Multi-Age Baby Car Seat, ISOFIX Car Seat, Top-Tether, Headrest/Harness Adjustment, 5 Recline Positions, Cushioned Inlay, Basic Black

Maxi-Cosi Titan Car Booster Seat, 9‑36 kg, 9 Months-12 Years, Multi-Age Baby Car Seat, ISOFIX Car Seat, Top-Tether, Headrest/Harness Adjustment, 5 Recline Positions, Cushioned Inlay, Basic Black

Maxi-Cosi Titan Car Booster Seat, 9‑36 kg, 9 Months-12 Years, Multi-Age Baby Car Seat, ISOFIX Car Seat, Top-Tether, Headrest/Harness Adjustment, 5 Recline Positions, Cushioned Inlay, Basic Black

Maxi-Cosi

10.0

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2

Jovikids I-Size Booster Seat for Car with ISOFIX, 125-150cm (Group 2/3, 3-12 Years), Portable Booster Seat for Kids, Comfortable, Compact, Convenient for Everyday Use, Great for Travel, ECE R129, Blue

Jovikids I-Size Booster Seat for Car with ISOFIX, 125-150cm (Group 2/3, 3-12 Years), Portable Booster Seat for Kids, Comfortable, Compact, Convenient for Everyday Use, Great for Travel, ECE R129, Blue

Jovikids I-Size Booster Seat for Car with ISOFIX, 125-150cm (Group 2/3, 3-12 Years), Portable Booster Seat for Kids, Comfortable, Compact, Convenient for Everyday Use, Great for Travel, ECE R129, Blue

Jovikids

10.0

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6% off

3

Bubblebum Inflatable Booster Car Seat - Travel Booster Seat - Portable Car Booster Seat - Booster Seat for Car - Narrow Slim Foldable Car Seat Booster - Perfect for Kids 4-11yrs Old - Twin Black

Bubblebum Inflatable Booster Car Seat - Travel Booster Seat - Portable Car Booster Seat - Booster Seat for Car - Narrow Slim Foldable Car Seat Booster - Perfect for Kids 4-11yrs Old - Twin Black

Bubblebum Inflatable Booster Car Seat - Travel Booster Seat - Portable Car Booster Seat - Booster Seat for Car - Narrow Slim Foldable Car Seat Booster - Perfect for Kids 4-11yrs Old - Twin Black

BubbleBum

9.8

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4

Cybex Silver Solution X-Fix Child's Car Seat, High Back Booster, with Reclining Headrest, For Cars with and without ISOFIX, Group 2/3 (15-36 kg), From approx. 3 to 12 Years, Cobblestone

Cybex Silver Solution X-Fix Child's Car Seat, High Back Booster, with Reclining Headrest, For Cars with and without ISOFIX, Group 2/3 (15-36 kg), From approx. 3 to 12 Years, Cobblestone

Cybex Silver Solution X-Fix Child's Car Seat, High Back Booster, with Reclining Headrest, For Cars with and without ISOFIX, Group 2/3 (15-36 kg), From approx. 3 to 12 Years, Cobblestone

Cybex

9.7

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5

Kinderkraft Car Seat Comfort UP, I-Size Booster Child Seat, with 5 Point Harness, Adjustable Headrest, for Toddlers, Infant, Group 1/2/3, 9-36 Kg, Up to 12 Years, Gray

Kinderkraft Car Seat Comfort UP, I-Size Booster Child Seat, with 5 Point Harness, Adjustable Headrest, for Toddlers, Infant, Group 1/2/3, 9-36 Kg, Up to 12 Years, Gray

Kinderkraft Car Seat Comfort UP, I-Size Booster Child Seat, with 5 Point Harness, Adjustable Headrest, for Toddlers, Infant, Group 1/2/3, 9-36 Kg, Up to 12 Years, Gray

KinderKraft

9.5

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OtherRelated productsUp to 4% off

Cozy N Safe Augusta EZFix 4-12 Years Old (15-36kg, Group 2-3,) Multistage, Adjustable Headrest, Isofix High Back Booster, Adjustable Car Seat

Cozy N Safe Augusta EZFix 4-12 Years Old (15-36kg, Group 2-3,) Multistage, Adjustable Headrest, Isofix High Back Booster, Adjustable Car Seat

Apramo Child Car Seat, Ostara Fix Auto Eco High Back Child Booster Seat Group 2/3 (15-36 kg, 3 to 12 Years Approx.) with ISOFIX (Black Platinum)

Apramo Child Car Seat, Ostara Fix Auto Eco High Back Child Booster Seat Group 2/3 (15-36 kg, 3 to 12 Years Approx.) with ISOFIX (Black Platinum)

My Babiie Booster Lite R129 Car Seat - Lightweight at 1kg, Approx. 6-12 Years (125-150cm, 22-36kg), i-Size Backless Child Car Seat, Group 3, Compact, Portable, Ideal for Travel - Black & Grey

My Babiie Booster Lite R129 Car Seat - Lightweight at 1kg, Approx. 6-12 Years (125-150cm, 22-36kg), i-Size Backless Child Car Seat, Group 3, Compact, Portable, Ideal for Travel - Black & Grey

Jovikids I-Size Booster Seat with ISOFIX, Suitable for Child Height 125-150cm, Portable Car Seats with Cup Holder for Kids, Comfortable & Compact for Everyday Use, Great for Travel, ECE R129 (Black)

Jovikids I-Size Booster Seat with ISOFIX, Suitable for Child Height 125-150cm, Portable Car Seats with Cup Holder for Kids, Comfortable & Compact for Everyday Use, Great for Travel, ECE R129 (Black)

13% off

6

My Babiie i-Size Booster Seat - ISOFIX, 125-150cm (Group 3, 6 to 12 Years Approx.) Portable Child Car Seat, R129, Comfortable for Kids, Compact, Lightweight, Ideal for Travel - Black Quilted

My Babiie i-Size Booster Seat - ISOFIX, 125-150cm (Group 3, 6 to 12 Years Approx.) Portable Child Car Seat, R129, Comfortable for Kids, Compact, Lightweight, Ideal for Travel - Black Quilted

My Babiie i-Size Booster Seat - ISOFIX, 125-150cm (Group 3, 6 to 12 Years Approx.) Portable Child Car Seat, R129, Comfortable for Kids, Compact, Lightweight, Ideal for Travel - Black Quilted

My Babiie

9.3

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7

globalkids isofix Baby car Booster seat - Group 3 (6 to 12 Years Approx., 22-36 kg),Comfortable,Light Weight Compact,with Cupholders (red Grey)

globalkids isofix Baby car Booster seat - Group 3 (6 to 12 Years Approx., 22-36 kg),Comfortable,Light Weight Compact,with Cupholders (red Grey)

globalkids isofix Baby car Booster seat - Group 3 (6 to 12 Years Approx., 22-36 kg),Comfortable,Light Weight Compact,with Cupholders (red Grey)

globalkids

9.1

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8

Graco Affix R44 Highback Booster car seat with isoCatch connectors, Suitable from approx. 4 to 12 years (15-36kg), Stargazer fashion

Graco Affix R44 Highback Booster car seat with isoCatch connectors, Suitable from approx. 4 to 12 years (15-36kg), Stargazer fashion

Graco Affix R44 Highback Booster car seat with isoCatch connectors, Suitable from approx. 4 to 12 years (15-36kg), Stargazer fashion

Graco

8.8

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9

My Child Brundle Group 2/3 Booster, Grey, 700 g

My Child Brundle Group 2/3 Booster, Grey, 700 g

My Child Brundle Group 2/3 Booster, Grey, 700 g

My Child

8.6

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10

Jovikids i-Size Booster Seat with ISOFIX, Suitable for Kids 100-150cm (Approx. 3 to 12 Years), Adjustbale Height and Width, Portable Toddler Car Seat for Travel, Compact & Folding, ECE R129

Jovikids i-Size Booster Seat with ISOFIX, Suitable for Kids 100-150cm (Approx. 3 to 12 Years), Adjustbale Height and Width, Portable Toddler Car Seat for Travel, Compact & Folding, ECE R129

Jovikids i-Size Booster Seat with ISOFIX, Suitable for Kids 100-150cm (Approx. 3 to 12 Years), Adjustbale Height and Width, Portable Toddler Car Seat for Travel, Compact & Folding, ECE R129

Jovikids

8.3

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