BestEvMod Rivian R1S Trunk Mat Cargo Liner - All Weather Protection

In this review the BestEvMod Rivian R1S trunk mat stands out as a practical, no-nonsense protection upgrade for owners who use the third row up position and need a reliable cargo surface. The single biggest reason to consider it is its tailored 1:1 fit and durable TPE construction, which together prevent spills, dirt and shifting items from damaging the cargo area. This review looks at fit, materials, daily use and cleaning to help decide if it is the right interior accessory for a Rivian R1S from 2022 through 2026.

Key Features

• Perfect fitment: The liner is designed to the vehicle's original dimensions so it conforms closely to the Rivian R1S trunk floor and sits where the third row is up.
• Premium TPE material: Constructed from high-quality TPE for a balance of flexibility, tear resistance and long-term durability under regular loading and cleaning.
• Waterproof and anti-slip surface: The material sheds water and resists slipping, helping contain spills and keep cargo from sliding during driving.
• Protects interior: The mat shields carpet and floor surfaces from scratches, dirt, stains and debris that come from luggage or outdoor gear.
• Easy installation and cleaning: No tools required; the mat is placed directly into the trunk, can be wiped with a rag or rinsed with water for fast maintenance.
• OEM compatibility: Designed not to interfere with factory tie down anchors so normal cargo restraint options remain usable.

Who It's For

The BestEvMod trunk mat is best for Rivian R1S owners who routinely carry gear, pets or muddy items and want a tough, easy-to-clean surface that fits precisely with the third row up. It suits drivers who prefer a durable, waterproof liner over thin carpet protectors and who value anchor access and simple maintenance.

It may be less compelling for owners who never use the third row or who want full-coverage multi-piece liners for folding seat configurations; shoppers needing a multi-piece system for seats down positions should look at liners explicitly designed for full cargo mode.

Pros & Cons

Pros

• Precision 1:1 fit keeps the mat aligned with trunk edges and anchors.
• TPE construction offers a durable, waterproof and scratch-resistant surface.
• Prevents items from sliding and protects the floor from dirt and spills.
• Simple to place and clean without tools, maintaining OEM tie down function.

Cons

• Some customers report mixed lay flatness on initial install, so it can take time to settle completely.

Specifications

Brand	BestEvMod
Vehicle compatibility	Rivian R1S 2022-2026 (third row up)
Material	High-quality TPE (thermoplastic elastomer)
Function	All weather trunk mat / cargo liner for third row up position
Fit	Designed 1:1 to original vehicle dimensions
Maintenance	Wipe clean or rinse with water; no tools required

Our Verdict

The BestEvMod Rivian R1S trunk mat is a practical, value-oriented upgrade for owners who need reliable third row up protection. Its tailored fit, sturdy TPE construction and waterproof, anti-slip surface make it effective at preventing stains and damage while keeping cargo stable. For those who want simple installation, easy cleaning and preserved anchor access, it delivers good protection and durability for the price.

Frequently Asked Questions

Will this mat affect the factory tie down anchors?
The liner is designed not to interfere with OEM tie down anchors so you can continue to use factory cargo restraint points.

How do you clean the mat?
The mat can be wiped with a rag or rinsed with water for quick maintenance; its TPE surface resists stains and is waterproof.

Does it fit all model years of R1S?
It is specified for Rivian R1S 2022 through 2026 and is designed 1:1 to the vehicle dimensions for the third row up position.