4Knines SUV Cargo Liner, Trunk Protector, Waterproof Non-Slip, Extra Large Black Review (2026)

Sizing and vehicle fit

4Knines builds this liner in an XL size that measures 56 by 106 inches including a 22 inch bumper flap that folds up and over the rear bumper to guard the paint while loading gear. The brand lists this size as best suited to large and oversized SUVs, including the Chevrolet Tahoe, GMC Yukon, Toyota Sequoia, Ford Expedition and Lincoln Navigator, where the extra length covers a full cargo floor plus the fold-flat second row when needed. Because it is a universal liner rather than a laser-cut model for one vehicle, some owners with unusual cargo shapes may see gaps along the wheel wells or side panels. Campers hauling coolers, crates and muddy gear benefit most from the extra coverage this larger size provides over a standard liner.

Waterproofing and materials

The liner uses what 4Knines calls a K9-Shield waterproof, non-slip layer, built from a non-quilted waterproof laminate paired with a non-slip backing that grips the cargo floor so the liner does not bunch up or slide during a drive. The face fabric is heavy-duty and colorfast, and 4Knines states it is manufactured free of AZO dyes and other hazardous metals, a detail worth knowing if pets or kids ride near the cargo area. The company is clear that while the liner surface is fully waterproof, the stitched seams themselves are not watertight, so standing water or a fully soaked load can still seep through at the seams over time rather than through the fabric itself.

Installing and removing it

Setup relies on a set of quick-release clips that anchor to existing hooks or anchor points in the cargo area, and 4Knines advertises roughly a 60 second install once you locate the right anchor points for your SUV. No tools or permanent hardware are involved, so the liner can be pulled out entirely when it is not needed, for example when hauling something that does not need floor protection. Because installation depends on the vehicle's own tie-down or seat anchor hardware, fit and clip placement can vary by SUV model, which is part of why the liner is described as a universal rather than model-specific fit.

Cleaning a liner this size

4Knines designs the liner to be cleaned by hosing it down, wiping with a moist towel, or running it through a washing machine when it needs a deeper clean, though the brand notes that routine upkeep usually does not require a full wash. For pet hair, the recommended method is spraying the liner with water while it hangs to air dry, which loosens hair for easier removal instead of scrubbing it into the fabric. Given the XL liner's larger surface area, a full machine wash and air dry cycle takes real time and space compared with smaller liners, which is the trade-off for covering more of a big SUV's cargo floor. Regular hose-downs after muddy trips keep the fabric from staining.

Warranty and who should buy it

4Knines backs this liner with a Limited Lifetime Warranty and a stated 100 percent satisfaction guarantee, which signals confidence in long-term durability for a product that will see repeated loading of camping gear, coolers and wet equipment. It ships in black, grey or tan, so buyers can match interior trim. This XL size makes the most sense for owners of genuinely large SUVs who want a liner that reaches the bumper edge and handles pets or muddy gear regularly. Anyone with a compact or mid-size SUV, or a vehicle with an unusually shaped cargo floor, should measure carefully first, since the universal fit will not contour as precisely as a vehicle-specific liner.

Frequently asked questions