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UnderCover Flex

Starting At*: $879


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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.


511 Total
Michael G.
2020 Ford F-150
5 / 5
9 September 2020
No suggestions; everything from order to shipment to installation was nothing short of great.
Terry T.
2018 Chevrolet Silverado 1500
5 / 5
29 August 2020
John C.
2020 Ford F-150
5 / 5
29 August 2020
The cover itself is great! It's made with high quality components, feels solid, looks great, and is generally everything it claims to be. I love the design consideration of the drain tubes to help keep the bed dry -- nice work! My only comment for improvement is on the instructions (my version "Modified June 2019"). First, there is no instruction given on the forward-to-rear positioning of the... Read More
Michael A.
2017 Ford F-150
5 / 5
26 August 2020
Looks great.
Rafael M.
2020 GMC Canyon
5 / 5
20 August 2020
Good Quality
David S.
2019 Ford F-150
5 / 5
19 August 2020
The video installation is better than the paper guide.
Keith M.
2020 GMC Sierra 3500 HD
5 / 5
19 August 2020
Only thing I would suggest is state what the rubber filler strips are used for. THe weather seal is obvious but the smaller strips are less than obvious.
Frederick W.
2020 Chevrolet Silverado 1500
5 / 5
11 August 2020
Awesome product!
Tim R.
2020 Chevrolet Silverado 1500
5 / 5
7 August 2020
Best looking cover on the market. Easy to install. Very good directions. Looks great on the truck.
Ronald B.
2009 GMC Sierra 1500
5 / 5
30 July 2020
The undercover flex makes my truck look and feel brand new again! Absolutely Stunning!