Harness Booster Car Seats

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Car Seat Type

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  • A car seat with 3 modes of use - forward-facing harness, highback booster, and backless booster

Modes of Use

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Comfort Features

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Convenience Features

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  • Allows you to adjust the height of the headrest and harness in one motion for just the right fit

Safety Features

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  • Provides strength and durability for 10 years of use

Safety Installation

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  • The LATCH system allows you to securely install your car seat by connecting the lower anchor connectors built into your car seat to the lower anchors built into your vehicle. This is an installation method that does not require the vehicle seat belt.

  • Provides an easy, one-second attachment to vehicle seat's lower anchors with an audible click to help ensure secure installation

Product Results
Showing 5 of 5 results

SALE Nautilus® 65 3-in-1 Harness Booster Car Seat
Nautilus 65 3 in 1 car seat in harness booster mode
Nautilus® 65 3-in-1 Harness Booster Car Seat
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Sale Price $132.99 Strikethrough List Price $189.99 (30% off)

Tranzitions™ 3-in-1 Harness Booster
tranzitions 3 in 1 harness booster
tranzitions 3 in 1 harness booster
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Holiday Savings: 30% OFF! Discount Applied in Cart
Price range from $97.99 - to $139.99 $139.99

Nautilus® SnugLock® Grow™ 3-in-1 Forward-Facing Harness Booster
car seat
3 in 1 forward facing harness booster stages
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Holiday Savings: 30% OFF! Discount Applied in Cart
$259.99

Nautilus® 2.0 LX 3-in-1 Harness Booster Car Seat
Nautilus® 2.0 LX 3-in-1 Harness Booster Car Seat
Nautilus® 2.0 LX 3-in-1 Harness Booster Car Seat
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Holiday Savings: 30% OFF! Discount Applied in Cart
$189.99

Nautilus® 2.0 3-in-1 Harness Booster Car Seat
Nautilus® 2.0 3-in-1 Harness Booster Car Seat
Nautilus® 2.0 3-in-1 Harness Booster Car Seat
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What an exciting time! Your little one is getting bigger, and it’s time for them to make the move to a booster seat. A 5-point harness booster car seat will help keep them safe while they get a new view from the back seat. Each harness booster seat can also be used as a high back belt-positioning booster when your child is big enough, like select models of our Harness Booster Car Seat. Various styles transition to a backless booster seat and feature which also features SnugLock Technology for a hassle-free car seat installation in less than one minute.

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