Best Seller Alert: UnderCover Ultra Flex

All truck bed covers are certainly not created equal. The UnderCover Ultra Flex hammers home that point. With a bevy of features, this cover not only stands out in the world of hard-folding tonneaus, but also takes the title of number one selling truck bed cover at UnderCover.

Keeping a truck’s bed protected is important to all drivers, whether they’re a professional contractor or a casual off-roader hitting dirt trails for the weekend. The tonneau category has grown to offer much more than just a simple rollback cover throughout the last few years. Covers can be as robust as a locking, hard-surfaced tonneau with the option to add racking on top, or as simple as a soft-rolling tarp to cover up your shovels and power tools on the drive to the next job.

The UnderCover Ultra Flex is a bit of a Goldilocks in this space, serving up a heavy-duty hard-folding truck bed cover with OEM styling and user-friendly operation. There are even a few bells and whistles thrown in for good measure. But before we dig into what makes the Ultra Flex a worthy contender in the tonneau space, let’s discover what’s actually happening in that space.

A Growing Segment

Tonneaus are a popular option for truck owners, whether they use their vehicle for work, play, or the occasional jaunt around town. Interestingly, the category, like most other truck accessory categories, grew in 2020. In SEMA’s Spring 2021 State of the Industry Report, the association found:

  • Most manufacturers and retailers saw growth across all exterior product categories, including truck bed covers.
  • More than 2/3 of retailers who sell and install truck bed covers saw their sales increase.
  • Overall, retailers saw significant growth in pickup parts, including truck bed covers. The average change among those retailers and installers who sell tonneaus was +17%. Among manufacturers, it was +32%.

Undercover Ultra Flex tonneau cover features and benefits

At UnderCover, specifically, Vice President of Sales Cory Kraft recently told SEMA that demand is up 40% compared to pre-pandemic levels. Clearly, the data indicates drivers want options for protecting their trucks.

UnderCover Ultra Flex

While many covers are aimed directly at the work truck market, the UnderCover Ultra Flex might be more at home on the outdoorsy or activity-driven rig. It’s not as rugged as the company’s ArmorFlex, which comes reinforced with LINE-X protective coating. However, the Ultra Flex still offers plenty of extra features to make it a top-notch cover.

Right out of the gate, the Ultra Flex offers a simple easy-on/easy-off installation with UnderCover’s clamp-on design, matched with the company’s L-Rails. Designed with flexibility in mind, it also boasts a dual-action tailgate that allows drivers to close the tailgate with the Ultra Flex up or down. The cover offers multiple riding positions, too. So, you still have full bed access regardless of how you prop up the cover.

You’ll want to make sure you follow the installation guide to get the most out of your Ultra Flex. For some select models, UnderCover has a supplemental guide as well. That document covers Chevy, Ford, Mazda, Dodge, Mitsubishi, Toyota, Nissan, and Suzuki models.


Undercover also has a super helpful YouTube channel with installation guides and demonstrations of product features which — let’s face it — can be a lot easier than trying to read a manual sometimes.

Form Meets Function

One of the standout visual qualities of the Ultra Flex is its sharp, uniform matte finish. That adds to the overall aesthetics, but it’s also part of the cover’s functionality. Matte finishes generally provide better UV resistance and are less prone to fading. So, the Ultra Flex is an excellent choice for drivers who need a tonneau that stands up to more intense bouts of sunlight in places like the southwest or arid, high-desert regions of the country.

A woman flips up the front panel of an UnderCover Ultra Flex tonneau cover to retrieve her camping bagBest of all, since matte finishes are now standard across multiple product categories in the automotive industry, you give your truck a uniform look. Whether that’s bumpers, nerf bars, or truck boxes, pair them together with the Ultra Flex for a complete package.

Taking a look under the hood, UnderCover’s gone the extra mile with the underside of the Ultra Flex, which features a carpeted finish. This adds to the protection of any cargo in the bed while also making it easier to clean the cover. The finished underside also adds a nice, OEM-quality finish to the cover, ensuring it looks good both inside and out.

Practical Lighting

Loading or unloading cargo at night or in low-light conditions is a problem for most truck owners. If your truck’s cab interior is adequately illuminated, why not light up the bed too? UnderCover addresses this need with a dual-rail lighting system built into the Ultra Flex.  There’s no more struggling to find a flashlight, or using your phone to see what’s in your bed when you get to the campsite late at night.

Finishing Touches

Outside of convenience and durability, UnderCover included built-in prop rods for open-cover driving, driver and passenger-side operation, and easy close tailgate operation. There’s also a set of seals and drain tubes to push water away from the bed, adding extra insurance to a dry, covered area for your gear.

Best of all, it’s backed by a 5-year warranty by the company to ensure you’re fully covered – no pun intended.

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