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UnderCover Flex

Starting At: $879.00

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The UnderCover Flex is a hard folding truck bed cover that gives you the ultimate control of your truck bed, offering three secure riding positions. The cover is easy to install and remove with our easy clamp-on design, and is mounted flush with your trucks bed rails making it the most watertight hard folding cover on the market. The Flex is constructed with heavy-duty aluminum panels providing strength and durability.

Each Flex has a bed rail mounting system equipped with rubber seals and drain tubes that carry water away from and out of the bed, keeping your gear dry and secure. The Flex is backed by a 3-year warranty making it America's favorite hard folding tonneau cover.

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



  • Low-Profile Design w/ an UV Protective Black Finish
  • Aluminum Top Skin Panel
  • Three Secure Driving Positions, with 100% Bed Access
  • Dual Action Tailgate Seal for Easy Operation
  • Made in the USA


Please feel free to make use of the UnderCover 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 Flex carries a 3-year warranty.

Full Bed Access

Built-in prop rods secure the cover allowing your truck to be driven with the cover fully open.

Weather Resistant

Rubber seals and drain tubes channel water away from and out of the bed.

Heavy-Duty Construction

The Flex is constructed with heavy-duty Aluminum panels providing strength and durability. The SpeedKlamps lock the cover in place at the rear, adding strength and stability for your off-road adventure.


207 Total
Matthew M.
2019 GMC Canyon
5 / 5
17 July 2019
I had an Undercover tri-fold tonneau cover on my 2014 Silverado. I didn’t have any issue. So, I go... Read More
jesus b.
2017 GMC Sierra 2500 HD
5 / 5
11 July 2019
Mark H.
2019 Chevrolet Silverado 1500
5 / 5
7 July 2019
Zachary H.
2019 Chevrolet Silverado 1500
5 / 5
28 June 2019
Cover isn’t designed to seal at the corners. Kind of a lack of effort on the design side to seal t... Read More
Kelly L.
2015 Chevrolet Silverado 1500
5 / 5
26 June 2019
I had an issue with my original cover. Spoke with Paul through customer service. Without question w... Read More
Christina H.
2019 Ram 1500
5 / 5
26 June 2019