Features
- Compatible with onBoard™ LT, onBoard™ FLX, onBoard™ LTX, and Comfort infant car seats
- 2-position adjustable recline
- LATCH equipped
- Lightweight

Everyone loves a little extra time. Installing an extra base in your second car makes it easier when traveling with baby. Choose your car, click in your compatible Safety 1st car seat into the Safety 1st onBoard™ LT Adjustable Infant Car Seat Base, and you'll be able to get on the road right away. The base is LATCH equipped and has an adjustable 2-position recline to help with an easier installation. This extra base is compatible with the onBoard™ LT, onBoard™ FLX, onBoard™ LTX, and Comfort infant car seats. The seat (not included) is also designed to be easier for parents to use. It’s a light infant car seat that can accommodate a baby up to 35 pounds, making it much easier to carry. The harness adjusts easily from the front of the seat with a simple pull for a secure fit for your child, and the base height adjusts for the right fit for your car.
The Coreplex take
39 similar car seats comparedThis infant car seat base is significantly cheaper than most alternatives, offering a budget-friendly way to simplify vehicle transfers for multiple cars.
Price
$39.99
Cheaper than 39 of 39 similar car seats
Best for
Worth knowing
Compared with 39 similar car seats from 16 sellers on Shopify, using their listed prices, ratings and specs. The summary is AI-written from the listing and these numbers; confirm details with the seller.
Summarized from Shopify’s product catalog. Confirm details with Safety 1st before you buy.
Picked to go with this item
From the official store
You check out with Safety 1st. Coreplex doesn’t sell or ship this item.
Facts come from Safety 1st’s listing and Shopify’s product catalog, as stated by them. Anything Coreplex writes is labeled as ours.
Safety 1st listing ↗ · checked Oct 14, 2026
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