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UnderCover Flex

Starting At*: $879

$75 Factory Rebate through 6/30 $75 Factory Rebate through 6/30

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
  • 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.


417 Total
Nick R.
2016 GMC Sierra 1500
5 / 5
18 April 2020
Overall the quality is awesome and it’s so simple to install. Would take less than a few minutes to remove if needed. Weather stripping wouldn’t stick on bulkhead very well because of factory bed lining. Thinking about replacing it and putting sticky side of weather stripping on cover itself.
Jason C.
2017 Chevrolet Colorado
5 / 5
16 April 2020
Ordered Monday night, delivered 9:30 AM Thursday morning, finished install by 11:30 AM. Easy self-install. Fits, works, and looks great! 10/10, would recommend!
Terry R.
2019 Ford F-250 Super Duty
5 / 5
16 April 2020
Great product
Mark E.
2020 Jeep Gladiator
5 / 5
3 April 2020
Excellent cover for my Jeep Gladiator. Looks good an went on per instructions.
Daniel G.
2019 Ram 3500
5 / 5
30 March 2020
This is my third and they are excellent hard tonneau covers
Gary P.
2018 Ford F-150
5 / 5
29 March 2020
Traded in my 2014 F150 (with Undercover Flex) for 2018 F150 and 1st addition ordered was another Undercover UltraFlex
Michael B.
2018 Chevrolet Silverado 1500
5 / 5
25 March 2020
Great product. The small plastic piece that holds the locking arm when cover is folded broke the other day. Need replacement part please.
Don S.
2020 Chevrolet Silverado 1500
5 / 5
23 March 2020
This is my second Flex bed cover. First was on 2015 Silverado. From same dealer. Great cover.
Sheila S.
2000 Ford F-250 Super Duty
5 / 5
21 March 2020
Upon receipt of my item and opening the box everything was packaged well, the box was in good shape but ONE of the Plastic connectors that Holds up the Prop Rod on the passenger side was broken. It's the connector that the rod snaps in and out of. The connector was broken at the base portion that fits into the rail. Otherwise I really like the way it installed, very easy and the overall quality se... Read More
John W.
2019 Ford Ranger
5 / 5
19 March 2020
I love this top!