Safety 1st OnBoard FLX Infant Car Seat, Monument 4
$101.99
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Price: $149.99 - $101.99
(as of Oct 19, 2025 16:55:22 UTC – Details)
Give baby a comfortable, secure fit with the ultra-lightweight onBoard LT Infant Car Seat. Weighing less than 8 lbs., this seat is so easy to carry. The 4 harness heights are spaced just right to give your child a better fit from 4-30 lbs. The buckle adjusts two ways so that you can customize not only the length, but also the buckles position on your child. Smaller babies get the extra support they need with head and body inserts that can be removed as they grow. The seat is also designed with a reclined body position for a more secure ride. The harness adjusts easily from the front of the seat with one simple pull, and the base height adjusts for the right fit in your car. The car seat is compatible with all Safety 1st strollers that feature QuickClick, which allows you to attach the infant car seat to your stroller with one simple click, making it easy to use the car seat and a stroller together as a travel system.
EASY FOR PARENTS, A COMFY, SECURE RIDE FOR LITTLES The onBoard FLX Infant Car Seat fits little ones 4–30 lbs. rear-facing and up to 32″. Compatible with Safety 1st strollers with QuickClick, which ensures car seat attaches securely to stroller with 1 click.
AN ULTRA-LIGHTWEIGHT CARRY Getting out and about with your baby has never been easier than with this super light car seat. The infant carrier weighs under 8 lbs., so no more struggling with a heavy seat.
EASY IS THE NAME OF THE GAME The onBoard FLX Infant Car Seat is LATCH-equipped for quick installation. The 1-pull harness adjustment is simple and gives baby a secure fit. Seat pad is machine-washable and dryer-safe.
ALWAYS JUST RIGHT Newborn head and body inserts for the perfect fit for the littlest travelers. 4 harness heights are spaced for adjustments as little one grows. Adjustable base for the right fit in your car.
ADDITIONAL FEATURES YOU’LL LOVE Side Impact Protection (SIP) with deep sides and energy-absorbing materials. 5-point harness with up-front adjustment. Airplane-ready. Meets or exceeds federal safety standards.
Jennifer Schnider –
Amazing product
Exactly as pictured. Was so glad to get this during prime days.
Lindsey D –
Quick and easy!
I’ve bought this car seat base three times now because it makes life so much easier with little ones. We have one in each of our cars so we don’t have to worry about moving just one back and forth. Installation is quick and secure, and I always feel confident that my baby is safe. The seat clicks in and out smoothly, which is a huge help when juggling kids and diaper bags. With two kids (a toddler and a newborn), the convenience of having multiple bases has been a total lifesaver for our busy family. Highly recommend to any parent who wants both safety and simplicity!
stephani bruce –
Good extra base
Worked as it should. Seat fit correctly into base and installed easy. Was easy to tighten fit well into car seat. Good option for an extra base
Monica B. –
Save time moving bases from car to car!!
As new Grandmother this is a must have. I purchased my and daughter and her husband the stroller and car seat base combo and this is an extra addition to go in many vehicles. So, so, so worth the purchase.
MED –
Easy to use
Good for the second car and for the grandparents cars. Love the snap in car seat so we can easily change cars without the hassle of strapping in every time.
Wendy –
it fit
Perfect fit with the seat. However, I’m not sure how secure it is because of the way it is designed. It wiggles a lot no matter how tight I pull the straps.
Savannah Christiansen –
Great second base
This works great with our car seat. It easily snaps in and out. It has been nice to have one in each car so we don’t have to move it back and forth all the time. For the extra money we felt it was worth buying a second one.
Rachel –
Me gustó mucho
Muy buena luce exactamente como en la descripción me gusto
Vya ro –
Excelente porra bebe fresco y cómodo el mejor