See More

UnderCover Flex

Starting At*: $879


Need your product faster? Visit your local dealer for expert installation and superior service


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.


587 Total
Cindy B.
2012 Ram 1500
5 / 5
24 February 2021
I have had my Flex cover for 8 1/2 years. I’d buy another one in a heartbeat, and I recommend it to anyone who asks.
Joe T.
2017 GMC Sierra 1500
5 / 5
21 February 2021
Glad I waited to find perfect cover
matthew k.
2021 GMC Sierra 1500
5 / 5
20 February 2021
Love the look and the way it works, it does leak in one area that is somewhat frustrasting. Overall works very well.
Gabriel D.
2021 Chevrolet Silverado 1500
5 / 5
17 February 2021
Great customer service
Vyvyan R.
2019 Nissan Frontier
5 / 5
17 February 2021
I watched some YouTube videos before making my decision to buy this one. The reviews were great
Bruno M.
2021 Ram 1500
5 / 5
10 February 2021
Love it so far
Jerry S.
2021 Toyota Tundra
5 / 5
7 February 2021
This is my second cover. I like the install, and I like the lightweight cover.
Joshua M.
2020 Ford F-150
5 / 5
5 February 2021
Had one on my last truck also. And will have one on my next truck.
Steve P.
2021 Ram 1500
5 / 5
30 January 2021
This is the 2nd Undercover Flex Top (Tri fold) I have owned and would highly recommend it to anyone
Brian F.
2020 Ram 2500
5 / 5
3 January 2021
this is the 2nd one I have owned and very happy with them both