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Safety 1st

Safety 1st Convertible Car Seat, Convert from Rear to Forward Facing and Belt-Positioning Booster, High Street, From Birth to Age 10, TriMate

Based on 15 reviews
Condition: New
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$149.00
Save $30.99 was $179.99

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At a glance

Condition
New
Color
High Street
Model
CC342HAY
Dimensions
24.39"D x 23.19"W x 17.42"H
Weight
7 kg
Material
Polyester
Installation Type
Latch

Features 5

  • 3 MODES TRANSITION FROM BABY TO BIG KID: Three modes of use: rear facing baby car seat (540 lbs. and 19"40"), forward facing toddler car seat (3065 lbs. and 34.4"49"), and belt positioning car seat booster (40100 lbs. and 43.4"52").
  • FITS 3 ACROSS THE BACK SEAT: The travel car seats ultra-slim design just 17" across without the cup holders allows parents to fit three carseats across the back seat of most vehicles without sacrificing comfort.
  • CLEAR, SIMPLE INSTALLATION AND ADJUSTMENT: TriMate All-in-One carseat features a 9-position headrest that adjusts with just one hand, a hassle-free harness system that adjusts without re-threading, and visible belt paths for easy installation.
  • KEEPS LITTLE ONES COZY: The car seats come with a soft, memory-foam infant insert that keeps small babies comfortable and secure.

Description

The Safety 1st TriMate All-in-One Convertible Car Seat is built for growing with your child while keeping them secure and comfortable on the journey. This versatile 3 in 1 car seat is designed to accommodate children from birth to age 10: rear facing car seat for newborn to toddlers (5–40 lbs. and 19""–40""), forward-facing carseat for toddlers (30–65 lbs. and 34.4""–49""), and a belt-positioning booster seat for children 40 lbs and up (40–100 lbs and 43.4""–52""). Ideal for families with multiple children, the ultra-slim design fits three car seats across the back seat of most vehicles, making it a convenient infant to toddler car seat and big kid booster car seat. Beyond its easy installation, the TriMate features a 9-position headrest that adjusts with one hand and has a hassle-free harness system without complicated re- threading. This convertible carseat is equipped with visible belt paths for easy setup, making conversion between modes a breeze. Smallest passengers stay cozy with the soft, memory foam infant insert, while older kids will love the comfortable ride in this booster car seat. This car seat meets or exceeds Federal standards.

Specs 20

Maximum Weight Recommendation 100 Pounds
Forward Facing Maximum Weight 65 Pounds
Rear Facing Minimum Weight 5 Pounds
Installation Type Latch
Orientation Rear Facing
Harness Type 5 Point Harness
Number of Height Positions 3
Brand Safety 1st

Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

If your considering, get it
Pleasantly surprised, it’s bigger than expected my little loves it and thinks it’s super comfy. There’s a lot of padding it’s really good quality. The installation was a little tricky but worth it.
Reviewed in the United States on November 21, 2025 by Bre
Easy to install and versatile
Very nice seat. It will adjust to follow the growth of your child from infant to toddler boaster. So glad I bought it. Defiantly recommend!
Reviewed in the United States on February 4, 2026 by Kelly Longbrake
Awesome Value!
We are a foster family and own 7 seats all together, 3 of this kind and 4 of a random assortment. I love this car seat. It was very easy to install using the tether system. We got a tight, wiggle-free install the first time by putting one foot into the seat, shifting weight in, and pulling taut on the LATCH strap. Very straightforward. The no-rethread harness is extremely intuitive and easy to use. I find the recline positions appropriate for each stage. This car seat is the EASIEST to clean that I’ve ever used. There is no need to undo any part of the harness to wash the fabrics. Other no-rethread seats we own, you still must remove them to take off the fabrics but not this one. I think it is excellent value for money with the features included here. Can confirm these seats fit 3-across easily in a Subaru Outback. They are our favorite! ... show more
Reviewed in the United States on October 3, 2025 by Angela
great value; good product
Color: Dark Horse
good car seat
Reviewed in the United States on April 1, 2026 by Michael L. Williams
Easy
Super easy to install and use. Randomly got this on flash sale for $150. The pictures made it look like brown and yellow so I assume that's why it was on sale. But when we opened the box we were pleasantly surprised it was a nice beige and deep purple.
Reviewed in the United States on December 29, 2025 by C
It a good buy
Color: High Street
Very good quality
Reviewed in the United States on February 19, 2026 by Caroline
Well made
Color: High Street
Very well made
Reviewed in the United States on March 4, 2026 by Gramma Debbie
Do NOT buy this Cheap carseat!!!
Color: High Street
Absolutely hated this carseat. We bought it for our mom's house so she would always have a carseat when she has our kids and if we flew to visit her we would have a carseat and wouldn't have to fly with one. #1 highly aggravating to install and didn't like the way it fit in a truck backseat. No matter how we strapped it down, every turn we made it would tilt over with our son in it. #2 We've had multiple carseats and even rented some when traveling around and this was still the WORST one we've ever had! #3 The cup holder kept falling off so you can really tell the quality of how it's made. The whole seat has a cheap feel. #4 Our child is still Rear facing and it was extremely difficult to get him in and out. #5 When the carseat is Rear facing the tightening strap for the harness was unaccessible. As you can imagine that is very frustrating! I HIGHLY do NOT recommend!!!! ... show more
Reviewed in the United States on January 2, 2025 by Audrey W Hull
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