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UnderCover Ultra Flex

Starting At*: $989


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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.


531 Total
Anthony P.
2020 Chevrolet Silverado 1500
5 / 5
11 September 2020
Gary B.
2020 Chevrolet Silverado 1500
5 / 5
4 September 2020
i changed styles on this truck. i had a one piece tonneau hard cover on my GMC Serria for ten years. i never had any problems with this cover,just decided after looking at other covers to go with this one.Hope i get same satisfaction with this one.
Travis C.
2019 Ford F-350 Super Duty
5 / 5
31 August 2020
jesse c.
2020 GMC Sierra 1500
5 / 5
28 August 2020
looks great
Stephen V.
2019 Toyota Tacoma
5 / 5
19 August 2020
The instructions and available videos made installation pretty straightforward.
Mark G.
2020 Chevrolet Silverado 1500
5 / 5
18 August 2020
Great quality, easy installation!
Matthew W.
2016 Ford F-150
5 / 5
17 August 2020
Excellent cover! Definitely superior to the Bakflip MX4!
Tom B.
2020 GMC Canyon
5 / 5
17 August 2020
Love my Ultra Flex Undercover
Kemonde L.
2014 Chevrolet Silverado 1500
5 / 5
16 August 2020
Really nice look and finish, and a cool light in the bed
Tom N.
2019 GMC Canyon
5 / 5
6 August 2020
Great Cover