Seat Protectors

One question we see a lot as CSPTs is, “how do I protect my vehicle’s seats when a car seat is installed?”  It’s a valid question, especially for expectant parents who wonder what the car seat will do to a vehicle’s interior which was previously untouched by car seats and ground goldfish crackers. If you would like to know if your specific seat permits a protector, read our article, “Seat Protectors at a Glance.”

At CSFTL, we don’t recommend using any product or item between the vehicle seat and the child restraint because as CPSTs, we often see them misused. Ultimately the decision is up to the parent.

What can you do to protect your vehicle’s seats without sacrificing your child’s safety?

First and foremost, read your car seat manual. The manufacturer of your child restraint may allow a towel, blanket, or their specific brand of seat protector; or they may specify that nothing should be used under the seat at all. It’s important to follow all of the directions set forth by the manual.

What exactly is the danger in using a mat?

A thick mat between a child restraint and vehicle seat introduces space between the two. If the mat shifts over time, that can loosen the car seat’s installation.

To help you decide if a seat protector is for you, we’ve done a little field testing on some of the more popular options.

  • Thick fabric can compress in the force of a crash, mimicking a loose installation when that bulky fabric compresses under the weight of the seat and force of the collision.
  • Mats with  “grippy” sides can “grip” the vehicle seat and make the child restraint seem tightly installed, but in reality it may not be. One of the items that is not recommended for this very reason is shelf liner. Once highly recommended to “help install seats properly,” shelf liner is no longer included in the CPST curriculum. Shelf liner can also permanently damage your vehicle’s seats and has been known to melt onto them. Yikes!

Generally speaking, a properly installed child restraint won’t damage your vehicle’s seats. The “dents” caused by car seats go away; usually rather quickly — a mat isn’t going to prevent that anyway. The best way to care for your leather seats and to keep the vehicle’s interior in good condition is to use proper cleaning products.dentsnodentscollage

Child labor

With three rowdy children in my Odyssey, I see a lot of mess and kid grime, so I definitely need to use something to keep my vehicle looking its best. About once a month, usually when I’m cleaning the child restraint covers and vacuuming my vehicle I use wipes meant for cleaning and conditioning leather vehicle seats.

Some manufacturers test their seat protector mats and state that the seat protector mats comply with Federal Motor Vehicle Safety Standards (FMVSS). This sounds convincing, but here’s the caveat:

There isn’t any mention of seat protector mats in FMVSS. There are no standards, regulations, or benchmarks for testing these products. We don’t know how the mat was tested and how it performed, or what any of the testing really means. If a company says they’ve tested a seat protector mat and approves it for use with their brand of child restraints, we can trust that they’ve done their own testing and that it is safe to use with their products, but it is still imperative that you test that the seat is properly installed with the mat in use.

Here’s how to see if a mat works under your child’s car seat:

1. Make sure the item you have is allowed by the car seat manufacturer.

2. Install the child restraint over the item as per the manufacturer’s instructions. Make sure it moves no more than 1 inch at the belt path side to side and front to back.

3. Remove the item. Either yank it out, or undo the seat belt or one side of lower anchor connectors without loosening the seat belt or LATCH strap.

4. Re-buckle the belt or attach the lower anchor strap.

6. Test for movement. Is there a difference? Does your child restraint or restraint base now move more than 1 inch at the belt path?

If the car seat tightness has to be adjusted when the mat is removed, it is too thick to use.


This test used a Graco SnugRide 30 infant car seat base. Graco allows the use of mats, towels, and blankets under their seats.

When I install the base, I check at the belt path to make sure that it isn’t moving more than 1 inch side to side or front to back. I’ve installed it using the lower anchors with ease, and I didn’t need to use any item under the base to achieve a good installation.

testing movement

Check for movement here, at the belt path. All car seats will move at the back and top. As long as it isn’t moving more than 1 inch at the belt path, side to side or front to back, it’s fine. Your child restraint need not be immobile.

receiving blanket

In this next photo, I have placed a thin receiving blanket under the base before I installed it.  It is folded because it is very wide, but it is so thin that it is not adding any bulk under the base and it doesn’t interfere with the installation in any way. Bonus: most parents have a bunch of receiving blankets around.

I can pull it out and test the installation, so I don’t have to unbuckle anything. When I tested this blanket, the base didn’t move more than 1 inch at the belt path before or after I removed the receiving blanket, so this is a safe option.

thin towelNow I’ve chosen a thin, single layer, towel. I can also pull this one out without uninstalling my base, and the base does move a little more than when the towel was under it, but it does not move more than 1 inch at the belt path, making it a safe option as well.

thick towel

Here I’ve use a towel that has been folded multiple times. It’s very bulky and squishy. I have to undo one of the lower anchor connectors, and when I remove the towel, the base moves much more than 1 inch at the belt path. This bulky, folded towel isn’t a safe option because it could compress during a crash.

seat mat.12

Next, I’ve used a seat protector mat under the base. It has two “modes”  (one for “infants” and one for “toddlers”) and I am using it in the “infant” mode. Note the warning on the tag.


movement with matThe top part of the seat protector mat is folded and between the  base and the vehicle seat, per the seat protector’s instructions.

The base can’t be directly next to the seat back because of this folded area. The mat is supposed to be made specifically so one has access to the lower anchors.  This mat covers my lower anchors, and not only does that make it much more difficult to get them attached, I had to work much harder to get a tight installation.

Additionally, because of the placement of the cover, I was unable to remove the lower anchor strap without loosening it to test the tightness of the base without the mat. Because I was not able to complete the test, I don’t know if this scenario would have “passed.” Installation was just as difficult with the seat belt because of the placement of the mat.

I strongly believe that the difficulty in installing and uninstalling the base with this particular seat protector mat was truly a clear example of “interfering with the installation.” The warning on the seat protector mat’s tag says not to use it if it interferes with the installation. Since it was interfering, I can’t use this mat.

full matThe instructions for this very hard mat said to use the full mat and clip a strap at the top if I’ve got a vehicle seat with a headrest. I do, so I followed the instructions.  According to the manufacturer, the hard shell design is meant to prevent vehicle seat compression. It has blue rubber gripper pads on both sides of the lower portion. There’s a note on the instruction guide and on the box about making sure to install your restraint as per the child restraint instructions and my base allows the use of something under it.

base on matThe lower anchors were easy to access, nothing was covering or obscuring them, so I chose to install using the lower anchors again. I could tighten the lower anchors so that the base moved less than an inch side to side, but because of the rigid mat, this was rather difficult.

This mat features non-slip pads which seemed to hold the base in place.

Removing one the of the lower anchors to get the mat out was difficult, but I was able to do so. Once I did, I found that the base could move several inches at the belt path which was very concerning. It was not properly installed at all. I am not sure the cause of so much slack was the grippy pads on both sides of the mat or the mat’s hardness, or both. I’m willing to bet that it was both.

Brica mat

See how far to the side the base can be moved once the seat protector was removed?

Your results with a seat protector mat may be very different from mine, but many aren’t. If you have a seat protector that is approved for use with your specific child restraint and have tested it and found that it does not interfere with installation, you can certainly decide to continue using that item. Hopefully, now you have a better idea of which items you can use and how to make sure that what you’re using is safe.

Always follow the instructions for both your child restraint and seat protector mat, and make sure to read the manual(s) thoroughly. When in doubt, contact the manufacturer or a CPST with questions or concerns.

No child product manufacturer endorsed or sponsored this blog post. The opinions and views within are my own and do not represent any child product manufacturer. This blog post is meant to be informational only, and can in no way substitute for a seat check with a CPST, and is not meant to substitute information found in your child restraint or product manual.