Lusso Gear Car Seat Protector for Baby Car Seat - Thick Padding - Seat Protector Under Baby Car Seat with 2 Mesh Storage Pockets - Black Waterproof Baby Car Seat Protector - Non-Slip Padded Backing

I use this one (https://amzn.to/4eFsRox) with my sons car seat and wraps around the head rest so it isn't going anywhere. It protects the seat and the car seat itself is buckled using the latch system. Plus we put chap stick or snacks in the pockets in front for easy access.

We rock the Lusso Seat Protector, it helps catch some of the detritus and you can just dump it in the trash.