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UnderCover Flex

Starting At*: $893


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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


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.


623 Total
Sally B.
2014 Ford F-150
5 / 5
14 May 2021
I replaced a hardcover bed cover with this cover It is so much easier to use! I'm really pleased.
Steven B.
2021 Ford F-250 Super Duty
5 / 5
12 May 2021
I like this cover better than the Bakflip I had on my other F250
Teri S.
2021 Chevrolet Silverado 1500
5 / 5
28 April 2021
I love it and its looks awesome on the Truck
Timothy B.
2016 Ford F-150
5 / 5
23 April 2021
Looks like an awesome bed cover. We'll see how well it fairs when headed to the woods. Definitely changed the look of my truck.
Rick E.
2021 Jeep Gladiator
5 / 5
20 April 2021
Great Product! Engineered to fit a 2021 Jeep Gladiator
Kevin R.
2019 Chevrolet Silverado 1500
5 / 5
15 April 2021
Looks great. Easy to operate.
2021 Chevrolet Silverado 1500
5 / 5
14 April 2021
Ryan S.
2021 Ford F-150
5 / 5
8 April 2021
This is my second Flex cover. My only complaint is the small brackets that hold on the prop rods broke very easily on my last unit.
Kenneth M.
2013 Ford F-150
5 / 5
6 April 2021
Fit nice and tight. Easy to operate.
Daniel C.
2021 Ram 2500
5 / 5
31 March 2021
This is my 2nd purchase of the Undercover Flex. Looks great and very functional on my new truck.