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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


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.


620 Total
Stephen Z.
2021 Ram 1500
5 / 5
23 February 2021
Looks great and works better than my expectations.
Joe P.
2009 Dodge Ram 1500
5 / 5
19 February 2021
The bed cover has performed flawlessly thus far.
Gary H.
2021 GMC Sierra 1500
5 / 5
5 February 2021
This is my second Undercover
Bill N.
2020 Ram 1500
5 / 5
4 February 2021
Looks Great easy access to bed of truck. Like when fully folded it doesn't touch the cab window or paint.
Curtis D.
2021 Chevrolet Silverado 1500
5 / 5
2 February 2021
Very Nice and convenient Topper
Roy G.
2020 Ram 3500
5 / 5
27 January 2021
Just got looks really good. Great value
Edward S.
2019 Chevrolet Silverado 1500
5 / 5
26 January 2021
So far I'm truly satisfied with product, install and overall service given at Linr-X.
Odie C.
2015 Chevrolet Silverado 2500 HD
5 / 5
25 January 2021
Met and exceeded my expectations.
Gregory L.
2020 Ford F-150
5 / 5
23 January 2021
This is my first pick up truck and the cover is perfect, so versatile!!
Kenny J.
2020 Toyota Tundra
5 / 5
18 January 2021
I like The flat surface easy to flip up and put down very secure for what I can see now I can keep my personal items in the back of the truck