Safety 1st OnBoard FLX Infant Car Seat (Monument 4)
Delivery in 8–14 Business Days.
processed within 1–3 business days
30-day return policy
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Brand new item that may show light cosmetic imperfections like minor scuffs due to handling or storage. Fully functional. Box may be damaged or may not ship in original box.
The Safety 1st OnBoard FLX Infant Car Seat in Monument 4 delivers a lightweight and secure option for transporting babies from 4 to 30 pounds and up to 32 inches in height. Designed for rear-facing use, it easily connects to Safety 1st strollers with QuickClick™ technology, allowing parents to transfer the seat from car to stroller in one smooth motion. Perfect for newborns and growing infants, this seat combines comfort, protection, and user-friendly features for families with active lifestyles.
LIGHTWEIGHT AND PORTABLE: Weighing less than 8 pounds, this infant carrier is easy to lift and carry, making everyday outings more manageable.
QUICKCLICK™ STROLLER COMPATIBILITY: Click the seat into any compatible Safety 1st stroller for a fast, secure fit—no extra adapters needed.
SIMPLE SETUP & CLEANUP: Features built-in LATCH connectors for easy vehicle installation. The seat pad can be removed, washed, and dried for quick maintenance.
GROWS WITH YOUR BABY: Equipped with removable infant inserts and a harness that adjusts to four different heights. The adjustable base helps achieve a proper recline in your car.
BUILT-IN SAFETY MEASURES: Engineered with Side Impact Protection and energy-absorbing materials. A 5-point harness with front adjustment ensures your baby is both secure and comfortable, and the seat meets or exceeds federal safety guidelines.
READY FOR TRAVEL: Certified for airplane use, this car seat is an ideal companion for families who are always on the move.
Processing Time: Orders are processed within 1–3 business days. No shipments on weekends or holidays.
Shipping Costs:
Free shipping on all orders.
Delivery Time: Estimated delivery time is 6–11 business days.
Tracking: A tracking number will be provided once your order ships.
Address Accuracy: Ensure your shipping address is correct to avoid delays.
- Return Eligibility: Returns can be made within 30 days if the item is unused and in original condition.
- How to Return: Contact us at info@isnib.com with your order number and reason for return.
- Return Shipping: Customers pay for return shipping unless the item is damaged or incorrect.
- Refunds: Refunds are processed to the original payment method after inspection. Allow 7 business days.
- Exchanges: We replace items only if they are defective or damaged.
Damaged or Incorrect Items
Contact us within 7 days of receiving damaged or incorrect items for a free replacement or refund.
Everything You Need To Know
Product FAQ
Everything You Need To Know
Product FAQ
Every product page lists what’s included (car seat shell, base, manual, etc.). If packaging is imperfect, accessories may vary - check the “Includes” section and condition notes.
If it’s new or open box, manufacturer warranty may apply - the product description will note this. For gently used/floor models, warranty may not apply, but we test functionality before listing.
Any wear is noted on the product page. Most items ship in the original box; some Floor Model/Gently Used items may not. Check the first line of the description for packaging details.
Once the order has shipped, we cannot cancel or change the address. If you reject a shipment delivery without prior approval, shipping fees may be deducted at refund.
Contact us to initiate a return. We’ll send a shipping label. Items must be returned within 4 days of receiving the label and in the same condition. Refunds processed after inspection (can take up to 7 days).
On delivery, check that you received all parts/accessories listed in the product description, inspect for any damage or discrepancies, then contact us promptly if something is missing or not as described.

