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UnderCover Ultra Flex

Starting At: $989.00

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A hard folding truck bed cover that comes with overwhelming new features and is topped off with an alluring matte finish. The Ultra Flex is in a category of its own. From the irresistible outward appearance to each component beneath the cover, the Ultra Flex has been carefully crafted to be the ultimate all-purpose truck bed cover.

All-new features that accompany the Ultra Flex include an integrated luminous rail light system for enhanced night vision, and a dual action tailgate seal, allowing for easy operation and you to close the tailgate with the cover-up or down. Multiple riding positions allow the user to ride with full access to their bed, and full weather protection is available if the cover is in the fully closed position.

Ultra Flex is an easy clamp-on application and can be installed and removed easily with our newly designed L-Rail’s. What’s more, the Ultra Flex is backed by a 5-year warranty, making it the most desirable folding cover on the market.

If you wish to learn more about the Ultra Flex visit our FAQ page


  • Ultra Low-Profile Design w/ a Stylish Matte Black Finish
  • Integrated Luminous Bed Rail Light
  • Carpeted Underpanels Provide a Finished OEM Look
  • Dual Action Tailgate Seal for Easy Operation
  • Made in the USA


Please feel free to make use of the Ultra Flex installation instructions below to assist you. Upon purchase you’ll receive vehicle specific instructions. However, if you have further questions or need technical assistance, please call one of our knowledgeable installation experts at 866-900-8800.


The UnderCover Ultra Flex carries a 5-year warranty.

Stylish Matte Finish

Solid aluminum panels polished with stylish matte black finish.

Ultra Finish Under Panel

A refined and Ultra tough carpet-like finish gives the Ultra Flex an OE look and feel.

Integrated Rail Light

The integrated luminous rail light provides illumination in your truck bed at night.


307 Total
2019 Ford F-150
5 / 5
17 January 2020
I would like to give 10's on my reviews. I've owned other tonneau covers, none compare to the attention to detail, quality, and looks that the Undercover Ultra Flex cover has shown me. The fastening system of Undercover is so simple and easy. I could go on...I'll never own another manufacture.
Dale H.
2011 Ford F-150
5 / 5
16 January 2020
Very nice cover and so easy to use.
Jon H.
2018 Ram 1500
5 / 5
14 January 2020
Just Great product. Getting the cover increase the functionality of the truck bed by a lot. Fully waterproof, easy to open and close. very good quality. loved that it is even with carpet isolation inside. does not show much on the outside and works great with the truck bed locking. fully recommended.
John M.
2020 Ram 1500
5 / 5
12 January 2020
MADE IN USA ! Top quality product!
Daniel N.
2018 Ford F-150
5 / 5
7 January 2020
I love everything about the Ultra Flex.
Mark M.
2020 Chevrolet Silverado 1500
5 / 5
7 January 2020
My 3rd Undercover product!
Mark A.
2020 Ram 1500
5 / 5
6 January 2020
A locking feature for added security would be nice.
2020 Ford F-150
5 / 5
4 January 2020
There was a minor scuff on one panel right out of the box.
Tri N.
2013 Ram 1500
5 / 5
25 December 2019
John L.
2019 Chevrolet Silverado 2500 HD
5 / 5
20 December 2019
love this bed cover so far