Brand new infant car seat still in the box. We had a warranty claim and as baby is getting big for the seat we've decided not to use the replacement. Date of manufacture is Dec 21 2020 Date of expiry is Dec 21 2026 Car seat was sent by Britax to us on March 24, 2021 and model is being sold in Canada (https://www.britax.ca/b-safe-35-infant-car-seat-cardinal), which requires compliance with safety regulations.