Keeping the interior of the Rivian R1S clean is very important. With the amount of rain, dirt, and unexpected spills that come with daily driving, the floor mats don’t always hold up. That’s when custom fit floor liners become genuinely useful. They’re designed to protect the R1S from all kinds of weather. In this guide, I’ll walk you through everything I’ve learned about choosing, installing, and maintaining them.
What makes floor liners “custom fit”?
Custom fit liners are actually mats specifically designed for the Rivian R1S. They’re not like the typical mats you can buy at home and cut to size. These liners are precisely tailored using 3D scanning technology to ensure that every nook and cranny of the car’s footwell, the edges of the seat rails, and the wide second-row floor are covered.
For an electric vehicle (EV) like the R1S, having a perfectly sized design is more important than you might think. Loose mats can easily soak up water and soak the carpet underneath. And when you have electrical appliances under your car’s floor, this is not a good idea. This precise and perfect fit provides a strong barrier for everyday protection.
Why are custom fit liners essential for all weather conditions?
The biggest advantage of custom Rivian R1S Floor Liners is that they can trap dirt and moisture. Their high edges, deep grooves, and rough surface all work together to trap liquids, preventing them from spilling onto the carpet underneath. I’ve seen firsthand how quickly water can seep in when I step into the car on a rainy day. And those high borders really make a difference.
Moisture or water control is even more important for electric vehicles. The R1S has sensitive wiring and other equipment under the floor, so water in the wrong place can cause serious damage in the long run. Custom liners trap liquids in the right place, where they can be easily cleaned up, reducing the risk of accidents.
A few real-life examples will make the point clearer: muddy hiking boots, wet beach towels, spilled coffee cups, or melted ice from a grocery bag—these are common occurrences. And liners catch them before they become a major problem.
Which parts of the R1S benefit the most?
The front row gets the most use. This is where coffee spills, dirty shoes, and everyday dirt accumulate. There have been many days when I thought—Gosh! If only I had put the liners on before this mess started!
The second row also takes a lot of abuse, especially if you have small children or pets. Food scraps, wet shoes, toys—they all find their way to the floor somehow.
The third row is a little different, and there are custom liners there to prevent water from pooling in the back corners. Without liners, that area is incredibly difficult to clean.
The cargo area is probably the most “lifesaver.” Grocery bags, camping gear, potting soil, work tools—it all ends up there at the end of the day. Having a cargo liner makes it much easier to clean the space, especially when the seats are folded.
Even a front trunk liner can be a great help, especially when you’re storing wet or sandy items there. It protects the plastic surface from scratches and makes everything easier to clean quickly.
Important Features to Look for When Buying
When looking at different brands of liners, I’ve noticed that certain features really make a difference. For example: raised borders or edges, which are not just for looks, but can actually catch stray items; a non-slip backing that keeps the liner in place; a surface texture that’s easy to clean; and a material that doesn’t create a strong odor, especially in hot weather.
Some liners also have heat-resistant features, which is important because the interior of an electric car can get very hot quickly. It’s also important to make sure the factory hooks or clips fit properly, although the R1S’s design is a little different than a typical gasoline-powered car.
How to Install Custom Fit Liners on a Rivian R1S
Installing floor liners is surprisingly easy. I usually remove the old mats and give the footwells or footrests a quick vacuum. If there’s any dust or dirt on the carpet, the liners won’t sit flush, so a clean surface will help the job go much smoother.
When installing 2025 Rivian R1S Floor Liners, I always make sure the edges are flush and there aren’t any kinks or folds. The corners of the R1S’s footwells are designed a little differently, so make sure each liner fits naturally into place. Check to see if the driver’s side liner is in any way obstructing the pedals. Press down on the edges to make sure everything is in place.
For the second and third rows, you simply lay them out and make sure there are no gaps where dirt can get in. Cargo liners usually require a bit more wiggling to secure, especially if they are designed to fit around seat anchors or attachment points.
How liners actually help
In the rainy season, liners keep water out of the carpet. After just a week of driving in wet weather, you’ll realize how much water they’ve absorbed.
In the winter, they trap mud and road salt, which would otherwise leave permanent stains on the floor.
When you’re out and about on a hot day, sand, dirt, and grass clippings pile up. Having liners makes it easy to brush off this mess.
And for everyday family use, whether it’s food scraps, pet footprints, or muddy school shoes—liners handle the mess, not carpet.
Last Word
After using custom fit liners on the R1S for a few days, I’ve come to realize that they’re not a luxury, but a necessity. They protect the interior of the car in every season and make cleaning much easier. If you’re outdoorsy, have kids, or just want to keep your Rivian looking like new for a long time—installing a good quality custom liner is one of the easiest and most effective upgrades you can make for your car.