Best Cargo Liner for Rivian R1S
The Rivian R1S is a masterpiece of electric engineering, but its luxurious interior is surprisingly vulnerable to the chaos of daily life. Whether you’re hauling muddy hiking boots or loading up groceries, the premium carpet in that massive cargo area needs a serious line of defense. After testing various options for fit, durability, and aesthetics, I’ve found that the WeatherTech Cargo Liner stands above the rest for its laser-measured precision. Here is my expert guide to the best cargo liners available today.
Our Top Picks at a Glance
Best Cargo Liner for Rivian R1S: Detailed Reviews
WeatherTech Custom Fit Liner View on Amazon
When it comes to American-made quality, WeatherTech is the gold standard for a reason. I’ve installed these in dozens of vehicles, and the R1S fitment is particularly impressive. The laser-measured design ensures that every contour of the Rivian’s rear cargo floor is covered, leaving no gaps for sand or spilled liquids to reach the carpet. The High-Density Tri-Extruded (HDTE) material provides a rigid core for strength while offering a tactile surface that prevents gear from sliding around during quick acceleration. One minor drawback is that the material can feel a bit “industrial” or plasticky compared to the R1S’s vegan leather interior, but for pure utility, it is unbeatable. It features a raised outer lip that creates a reservoir, perfect for those snowy ski trips where melt-off is inevitable. If you want the peace of mind that your sub-trunk is safe from leaks, this is your best bet.
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3D MAXpider Kagu Series View on Amazon
The 3D MAXpider Kagu series is consistently my favorite recommendation for EV owners who want a more “refined” look. Unlike the rugged, rubbery texture of competitors, the Kagu mats feature a unique carbon fiber embossed pattern that looks stunning against the Rivian’s minimalist cabin. Underneath that style is a three-layer structure that provides excellent sound dampening—something you really notice in a quiet electric SUV. The patented MAXpider bottom layer grips the carpet like Velcro without damaging the fibers, ensuring the mat never shifts while you’re driving. While the lip isn’t quite as high as the WeatherTech, it’s more than sufficient for everyday spills. I find the texture much easier to wipe down with a damp cloth than deeper-grooved mats. It’s the perfect middle ground for the R1S driver who wants protection that doesn’t look like it belongs in a work truck.
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SMARTLINER Custom Cargo Mat View on Amazon
Spending $100k on an SUV doesn’t mean you want to overspend on accessories. The SMARTLINER offers a surprisingly high-quality fit for the R1S at a fraction of the cost of “big name” brands. Made from a flexible, low-density polyethylene, it provides a functional barrier against dirt and mud. In my testing, I found that the material is a bit thinner than WeatherTech, which makes it easier to remove and hose off, though it might show scuff marks more easily over time. It lacks some of the premium “soft touch” feel found in more expensive liners, but it stays remarkably pliable even in freezing temperatures. The fit is surprisingly snug around the R1S wheel wells. If you primarily need a liner to prevent stains from sports gear or occasional home improvement runs, the SMARTLINER provides 90% of the performance of premium brands at a much friendlier price point.
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Rivian Official Adventure Gear View on Amazon
For those who want their accessories to be as authentic as the vehicle itself, the Rivian Official Adventure Gear cargo liner is the obvious choice. This isn’t just a rebranded third-party mat; it was designed by the same team that crafted the R1S interior. The fit is, predictably, perfect. What I love about the OEM mat is the aesthetic integration; it features the iconic Rivian compass logo and a texture that mimics the floor mats in the front of the car. It’s made from a heavy-duty, recyclable material that feels incredibly robust. You’ll notice it has a slightly higher price tag, and availability can sometimes be an issue through the Rivian Gear Shop, but the “factory” look is unrivaled. It handles the folding third-row mechanism gracefully, which is a common pain point for cheaper mats. If you want your R1S to look “complete,” this is the one to get.
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EVBASE Seat Back Protectors View on Amazon
The Rivian R1S presents a unique challenge: when you fold down the third-row seats, you expose even more carpet. Most cargo liners only cover the floor area *behind* the seats. EVBASE solves this with their seat-back protector system. These are separate pieces that attach to the back of the second and third rows, working in tandem with a floor mat to provide a continuous shield of protection. I find this setup essential for owners who frequently haul large items like bicycles or lumber. The pieces use a high-strength adhesive/Velcro backing that stays put even when flipping the seats up and down. While the texture is a bit basic compared to the 3D MAXpider, the utility of being able to fold one seat at a time while maintaining protection is a game-changer. It’s an “add-on” style product that completes the cargo ecosystem for the truly adventurous R1S owner.
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Buying Guide: How to Choose a Cargo Liner
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| WeatherTech Liner | Rugged Use | ★★★★★ | Check |
| 3D MAXpider Kagu | Modern Style | ★★★★☆ | Check |
| SMARTLINER Mat | Value Seekers | ★★★★☆ | Check |
| Rivian Official | OEM Look | ★★★★★ | Check |
| EVBASE Protector | Full Coverage | ★★★★☆ | Check |
Frequently Asked Questions
Will these liners block my access to the R1S sub-trunk?
Most high-quality liners, like the WeatherTech and 3D MAXpider, are designed to be flexible enough to lift so you can access the sub-trunk. Some even feature a pre-cut or “hinged” area specifically for the handle. However, if you have a heavy-duty rigid liner, you may need to lift the entire mat to reach the storage area below, which can be slightly inconvenient if it’s loaded with gear.
Can I fold my third-row seats with the liner installed?
Standard floor-only liners are designed to sit behind the third row when it is in the upright position. If you fold the seats down, the liner will only cover the rear-most portion of the floor. To cover the entire expanded cargo area, you would need to add seat-back protectors (like the EVBASE) which move with the seats, providing continuous coverage regardless of the seat configuration.
How do I clean a TPE cargo liner?
One of the best perks of these liners is how easy they are to maintain. For light dust, a quick vacuum or a wipe with a damp microfiber cloth is enough. For heavy mud or spills, I recommend removing the mat from the vehicle and hosing it down with mild soap and water. Avoid using silicone-based dressings (like Armor All) as they can make the surface dangerously slippery.
Are these liners compatible with the R1S’s vegan leather?
Yes, all the liners recommended here are made from non-reactive materials like TPE or polyethylene that will not stain or damage Rivian’s vegan leather. In fact, they help protect the interior trim from being scuffed by hard plastic items or metal gear. Just ensure the mat is dry before installation to prevent any moisture from being trapped against the carpet for long periods.
Do third-party mats smell like rubber?
High-quality brands like WeatherTech and 3D MAXpider use advanced materials that are virtually odorless. Cheaper, generic mats found on some marketplaces can have a strong “new tire” smell due to lower-grade PVC or rubber. Every product on this list has been vetted for low-to-no odor, ensuring your R1S keeps its premium “new car” scent without being overpowered by chemical fumes.
Final Verdict
For the majority of Rivian R1S owners, the WeatherTech Custom Fit Liner provides the best balance of American-made quality and extreme protection. If you rarely go off-road and want to maintain the SUV’s sleek interior aesthetic, the 3D MAXpider is a fantastic alternative. For those who frequently transition between hauling passengers and cargo, I highly recommend pairing your floor liner with the EVBASE seat-back protectors for total peace of mind.