About UnderCover
UnderCover was founded in 1999 and entered the truck bed cover market in 2001 with the original UnderCover Classic. Covers and storage boxes are designed, engineered, and manufactured in Rogersville, Missouri, with the company's tooling and molds built in-house. In June 2010, UnderCover joined Truck Hero, the truck-accessory group that has since become RealTruck -- the same family that owns BAK, TruXedo, BedRug, and Extang -- so an UnderCover product bought through RealTruck ships direct from the manufacturer.
The brand's signature is a one-piece tonneau cover built from a proprietary ABS polymer blend, sold across lines like ArmorFlex, Ultra Flex, and the factory-color-matched Elite and Elite LX covers. Alongside its tonneau covers, UnderCover builds the Swing Case line of vehicle-specific truck bed storage boxes, which mount to the inside bed wall and swing outward for access without climbing into the bed -- the product line featured in our own testing.
Brand website: undercovertonneaucover.com
What UnderCover makes
UnderCover's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Swing Case truck bed storage boxes
vehicle-specific swing-out boxes that bolt to the inside bed wall using factory bed-stake pockets -- featured on RevRated — featured on RevRated
ArmorFlex tonneau covers
aluminum tri-fold hard covers that combine hard-lid security with soft-cover fold-down access
Ultra Flex tonneau covers
low-profile hard folding covers built for full bed access
Elite and Elite LX one-piece covers
factory color-matched painted covers with a one-piece ABS polymer shell
Replacement parts
latches, seals, and mounting hardware for existing UnderCover covers and storage boxes
Why we recognized UnderCover
The RevRated Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our hands-on category reviews. UnderCover earned it on the strength of the products below, evaluated the same way every product on this site is: bought, run on real vehicles, and judged on merit.
UnderCover products we rated highly
RealTruck UnderCover SwingCase Truck Bed Storage Box | SC100D | Chevy/GMC 2500/3500HD 2007-2019 Drivers Side
The swing-out door mounts to the inside of the bed wall and rotates over the tailgate area, so tools are reachable from the side of the truck instead of climbing into the bed -- a real advantage for short-bed Crew Cab owners who lose bed space to a saddle box. In our testing, 1,760-plus reviews at 4.6 stars across the SwingCase's truck-specific SKUs gave us the deepest track record we found in the swing-case category. Bolt-in mounting uses factory bed-stake pockets with no drilling, and because the box sits below the bed rail line, it pairs cleanly with roll-up and tri-fold tonneau covers that a crossover saddle box would otherwise block.
Read the 7 Best Truck Bed Tool Boxes of 2026 guide →What earned UnderCover the recognition
- The SwingCase line carries over 1,760 reviews at a 4.6-star average across its truck-specific SKUs, the deepest review base we found in the swing-out storage category.
- Swing-out access lets owners reach stored tools from the side of the truck instead of climbing into the bed, a distinct advantage for short-bed Crew Cab trucks.
- Bolt-in mounting uses factory bed-stake pockets with no drilling required, and the box can be removed without leaving holes in the bed.
- Under-rail mounting height means the SwingCase pairs with roll-up and tri-fold tonneau covers instead of blocking them, unlike a crossover saddle box.
- UnderCover has manufactured its covers and storage boxes in Rogersville, Missouri since 1999, and has been part of the RealTruck (formerly Truck Hero) family of truck-accessory brands since 2010.