Hellobee Boards

Same as @Truth Bombs: . I wish it was ok since I hate the indentations!

They are generally not recommended and some brands even forbid them. We do use an old nursing cover to protect the seat where DD's feet go. We hang it around the headrest and tuck it in between the vehicle seat and car seat. It doesn't impact the install and is easy to wash.

For our car with cloth seats we just take the seat out once a month for a day or so and any dents pop out. We vacuum the car while the seat is out and don't allow food in the car.

For our car that has leather seats we take the car seat out once a month and condition the leather. If we leave the seat out for 24-48 hours the dents pop out.

Some brands make a special mat to fit and are tested by the company to be safe - our britax and foonf both have them

if you ever have car seat questions, the Facebook group car seats for the littles is very, very helpful. A word of caution though, read their user agreement first.. I wouldn't call it an aggressive group (ok maybe a little aggressive but passionate is a better word) but just read the user agreement and scan some posts to get a feel for things.