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UnderCover Flex Hard Folding Truck Bed Tonneau Cover | FX21019 | Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1")

4.5 4.5 out of 5 stars 479 ratings

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CFD Diesel Performance
Eligible for Return, Refund or Replacement within 30 days of receipt
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Ships from CFD Diesel Performance
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Eligible for Return, Refund or Replacement within 30 days of receipt
  • This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
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High Gloss Black
5' 7" Bed
Flush Fit

Purchase options and add-ons

Brand UNDERCOVER
Style 2015 - 2020
Exterior Finish Smooth
Material Aluminum
Lock Type Tailgate

About this item

  • Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1")
  • 100% BED ACCESS | The Flex allows you to drive with the cover in three secure positions: closed, partially closed, & fully open. The cover folds into an upright position with dual prop rods, without resting on the back of the cab.
  • STYLISH LOW PROFILE DESIGN | The Flex hard folding cover has a gloss black finish and lies flush with the truck bed to enhance the appearance of your truck. It also features full perimeter seals to help prevent water intrusion.
  • EASY OPERATION | This cover has durable, aluminum automatic-latching panels that release with pull cables on either side of the truck. The dual-action tailgate seal allows you to shut the tailgate without lifting the cover first.
  • PURCHASE WITH CONFIDENCE | The UnderCover Flex hard folding tonneau is lightweight & easy to install. It comes with a 3-year, hassle-free guarantee, is made in the USA with globally sourced materials, & is backed by a US-based customer support team.
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$1,005.99
Get it Mar 25 - 27
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UnderCover Flex Hard Folding Truck Bed Tonneau Cover | FX21019 | Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1")
UnderCover Flex Hard Folding Truck Bed Tonneau Cover | FX21019 | Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1")
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Price-8% $1,005.99
List:$1,098.99
$499.95$1,139.00$539.99$1,199.99-16% $649.00
List:$769.99
Delivery
Get it Mar 25 - 27
Get it Mar 26 - 28
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Get it Tuesday, Mar 26
Customer Ratings
Easy to install
4.5
4.7
4.5
4.5
4.5
4.3
Value for money
4.2
4.7
3.6
4.6
4.2
4.1
Weatherproof
4.3
4.4
4.3
4.3
4.7
Water resistance
4.3
4.2
4.3
Mileage
4.3
4.2
4.0
Sold By
CFD Diesel Performance
TRUCKPRO
Amazon.com
Truck Gear Warehouse
Amazon.com
Amazon.com
size
5' 7" Bed
5' 7" Bed
5'5"Bed (66")
5' 7" Bed
5' 7" Bed
lock type
Tailgate
Tailgate
Tailgate
Tailgate
Tailgate
Tailgate
material
Aluminum
Polypropylene
Aluminum
Polypropylene, Aluminum
Aluminum
Aluminum
exterior finish
Smooth
Aluminum
Painted
Aluminum
Black
Aluminum
style
2015 - 2020
Folding
2021 - 2022
Folding
2015 - 2020
Gator EFX | Hard Tri-Fold

Important information

Safety Information

On Product Combined Cancer and Reproductive


From the brand


From the manufacturer

Hero Image

UnderCover Flex

Made In the USA with globally sourced materials.

3/4th view

tonno tag

prop rod

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 remove, requires no drilling for installation, and is mounted flush with your truck's bed rails.

Each panel is made of high quality FRP composite material; which is lighter, stronger, and more dent resistant than aluminum.

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

propped cover

rails

cover latch

Flex offers you three secure driving positions; Closed, to completely cover all of your cargo, Folded up, laying flat, toward the cab, or folded upright, at a 90 degree angle, for 100% Bed Access.

Each Flex has a bed rail mounting system that is equipped with rubber seals and drain tubes to carry water away from and out of the bed, keeping your gear dry and secure.

Easy-to-use slam latches are mounted on both sides of the cover and allow the cover to be opened from either side of the truck.

Product Description

The UnderCover Flex hard folding truck bed cover comes in a gloss black finish and lies flush with the truck bed. The Flex hard folding cover allows you to drive with the cover partially or fully open, providing 100% bed access when you need to transport large items that stick out of the bed. When fully open, the Flex is secured in an upright position with dual prop rods that lock into place and stow away easily when not in use. The Flex provides the ultimate security, with durable aluminum panels and an automatic latching system that locks the cover into the bed’s side rails. The latches are easily released with multiple pull handles underneath the cover, on either side of the bed, so you can effortlessly open the cover from either side of the truck. The Flex is also extremely functional, with a dual-action tailgate seal that enables you to close the tailgate without having to lift the cover first. The Flex is proudly made in the USA with a US-based customer support team and it comes backed by a 3-year, hassle-free guarantee. The Flex provides the ultimate security, with durable aluminum panels and an automatic latching system that locks the cover into the bed’s side rails. The latches are easily released with multiple pull handles underneath the cover, on either side of the bed, so you can effortless open the cover no matter what side of the truck you happen to be on. The Flex is also extremely functional, with a dual-action tailgate seal that enables you to close the tailgate without having to lift the cover first. The Flex is proudly made in the USA with a US-based customer support team and it comes backed by a 3-year, hassle-free warranty.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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UnderCover Flex Hard Folding Truck Bed Tonneau Cover | FX21019 | Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1")


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What's in the box

  • Auto Parts
  • Product guides and documents

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    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    479 global ratings

    Customers say

    Customers like the ease of installation using the tonneau cover. They mention that the instructions are straight forward and simple. They also appreciate the cover's appearance, saying that it looks pretty good and well designed. They praise the cover for being of the highest quality construction. Customers are also happy with the fit, saying it fits perfectly. They are satisfied with performance, and weather resistance. However, some customers have reported issues with the seal, mentioning that it leaks at panel seams.

    AI-generated from the text of customer reviews

    110 customers mention96 positive14 negative

    Customers find the installation of the tonneau cover pretty easy. They say the instructions are straightforward and simple. Some mention that the installation went smooth.

    "...It was easy to install - took me about 30 minutes using a socket wrench, and I have a bed liner...." Read more

    "...Setup was a breeze, once I paid slight attention to the instructions for where the clamps are supposed to attach to the rails...." Read more

    "...Installation went fairly easy. I watched the video on their site first which explained everything a lot better than the written directions...." Read more

    "...The instructions are straight forward but I also looked at a few online installation videos. The first time, it took my about an 1 hour...." Read more

    89 customers mention85 positive4 negative

    Customers are satisfied with the appearance of the tonneau cover. They mention it looks pretty good, is well designed, and has a clean, flush look. Some say that the cover is perfect and matches the stock plastics well.

    "...It looks good, fits perfectly, mine doesn't leak - even without the drain tubes and the weatherstripping installed (some have said theirs did), and..." Read more

    "...All looks good especially the hardware straps and latches. Very nice. Both rails have end caps so the install looks very clean...." Read more

    "...So perfect fit.Love the look with it being flush. It is more expensive than some others but the quality is there...." Read more

    "...Step descriptions were a bit unclear at times. The cover itself is good and I installed by myself in about 30 minutes...." Read more

    88 customers mention66 positive22 negative

    Customers like the quality of the tonneau cover. They mention it's solid, secure, and well worth the added cost. Some say that it has good features and is easy to install.

    "...They attach and detach very easily and seem to hold up well. I have not used the cover in the upright position while driving...." Read more

    "...I won't leave anything valuable in the back. It is secure enough to keep out people just walking by, but you could easily pop open any of these..." Read more

    "...The cover in general gives a clean, flush look and is definitely worth the money...." Read more

    "...a lot of covers at a local shop and found this to be the highest quality construction among the major brands...." Read more

    33 customers mention27 positive6 negative

    Customers like the fit of the tonneau cover. They say it's easy to align and adjust, and it fits perfectly the first time.

    "...It looks good, fits perfectly, mine doesn't leak - even without the drain tubes and the weatherstripping installed (some have said theirs did), and..." Read more

    "...I really had no alignment issues that other users had. It lined up perfectly the first time. Just put the rails flush against the back of the bed...." Read more

    "...All my own problems aside this is a very well made cover and fits perfectly and sits below the truck bed which is what I wanted...." Read more

    "...150 - thought I loved it but the armor flex was easier to install, fits better and looks way better" Read more

    23 customers mention23 positive0 negative

    Customers are satisfied with the performance of the tonneau cover. They mention that it works well, does a good job of protecting the contents of their truck bed, and has no issues or extra noise. Some say that the product is amazing and the installed drain tubes work as designed.

    "...It works great, is sturdy, flexible, and no issues with quality - with the exception of the plastic pieces...." Read more

    "...I installed the drain tubes at the cab-end of the bed, and they have worked great...." Read more

    "...design consideration of the drain tubes to help keep the bed dry -- nice work!..." Read more

    "...ran water hose over cover to check for leaks and the installed drain tubes working as designed. I used the holes near top of sidewall of the bed...." Read more

    23 customers mention19 positive4 negative

    Customers like the weather resistance of the tonneau cover. For example, they say it's completely weatherproof, keeps things secure, and dry. Some say that it does secure it from the elements. However, some customers mention that it protects camping gear from wind and weather.

    "The product was pretty well packaged and protected, had all the necessary accessories and very good precise instructions with pictures, obviously..." Read more

    "...I don't consider it a big deal because it works well to keep out water.It is not water tight but it is pretty close...." Read more

    "...how it looks on my 2020 F150 FX4 along with the fact it keeps bed contents secure/dry...." Read more

    "...stuff on road trips, kiddo sports games out of town, and has kept the weather out! I have absolutely loved the bed cover, and highly recommend it!..." Read more

    33 customers mention7 positive26 negative

    Customers are dissatisfied with the seal of the tonneau cover. They say that it leaks at the panel seams and fold between panels. They also mention that there's no way to seal the back of the cover to the tailgate in the corners of the rails. Additionally, customers say that the cover doesn't prevent water from getting into the truck bed.

    "...It is not water tight but it is pretty close. After torrential rains and snow, it has been bone dry...." Read more

    "...But... I have to say that it has leaked since the first rain storm after I bought it.It's frustrating, because it is not cheap...." Read more

    "...and you'll see too far back it wont close right and too far forward wont engage the seals. It looks too short but it does cover properly...." Read more

    "...It looks good, fits perfectly, mine doesn't leak - even without the drain tubes and the weatherstripping installed (some have said theirs did), and..." Read more

    14 customers mention4 positive10 negative

    Customers are dissatisfied with the scratch resistance of the tonneau cover. They mention that it arrived scratched, damaged, and with dents. Some reviewers also mention that the hinges leave dents in the outside of the cover.

    "Pictures show damages on two different covers. The first one arrived scratched, I’m usually not that picky but when spending over $1,000 on an item..." Read more

    "...Unfortunately, when packaged, the hinges leave dents in the outside of the cover...." Read more

    "...I’d buy it again, it’s tough, scratch resistant and looks great." Read more

    "...It did come damaged, one of the drain tube connections is broken and one of the brace holders was broken also...." Read more

    After Install  Review
    4 Stars
    After Install Review
    The product was pretty well packaged and protected, had all the necessary accessories and very good precise instructions with pictures, obviously quality printing.The rails were completely separate from the top, in their own box inside the larger container. They were easy to set up however the 3 clamps per side can be challenging if your alone, as I was.The top was a problem to set up, yes there are many videos that say install was about an hour or less. The entire top was covered in small aluminum shavings, many being smashed into the LineX coating. I had to vacuum, brush and scrap every one off the top and out of the coating if possible. Only a few vey small specks now that are embedded.The major issue is getting the top square to the bed sides. Very difficult, back and forth push pull, and tighten the clamps to get it square, even and symmetrical. Alignment of the top took about an hour, I’m a retired graphic design guy so everything has to be just so. One problem I noticed is that you need the latches to be dead center when engaging the rails. That’s what took so long, even left and right when looking at the top from the back of the bed at the tailgate. Now all 6 latches grab half way onto the rails. If I do it again, I know what to do now to speed it up. After a quick wash it’s ready.Per the advertisement, it is a fail as far as finish. The LineX coating is exactly like my bed, semi gloss. The only flat surfaces are the aluminum struts/supports. The coating is not flat!All looks good especially the hardware straps and latches. Very nice. Both rails have end caps so the install looks very clean.Now that the whole top is centered and square, every latch snaps closed as designed with just a small amount of effort.I’m giving only 4 stars because of the shavings, description of being flat black. I’d buy it again, it’s tough, scratch resistant and looks great.
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    Top reviews from the United States

    Reviewed in the United States on December 19, 2018
    Color: Premium Line-X CoatingSize: 5' 7" BedConfiguration: Flush FitVerified Purchase
    21 people found this helpful
    Report
    Reviewed in the United States on October 28, 2020
    Color: Premium Line-X CoatingSize: 5' 7" BedConfiguration: Flush FitVerified Purchase
    4 people found this helpful
    Report

    Top reviews from other countries

    Amazon Customer
    5.0 out of 5 stars The 2 day shipping by Purolator was a joke...10 days..
    Reviewed in Canada on March 27, 2021
    Color: High Gloss BlackSize: 6' 7" BedConfiguration: Flush FitVerified Purchase
    Andy S
    5.0 out of 5 stars Looks and works great
    Reviewed in Canada on March 8, 2021
    Color: Matte BlackSize: 5' 7" BedConfiguration: Flush FitVerified Purchase
    GeoffM
    5.0 out of 5 stars Buy it.
    Reviewed in Canada on September 19, 2019
    Color: Premium Line-X CoatingSize: 5' 7" BedConfiguration: Flush FitVerified Purchase
    2 people found this helpful
    Report
    Matt Bélanger
    5.0 out of 5 stars Really easy to install by yourself
    Reviewed in Canada on May 19, 2021
    Color: Premium Line-X CoatingSize: 6' 7" BedConfiguration: Flush FitVerified Purchase
    Amazon Customer
    4.0 out of 5 stars Good product
    Reviewed in Canada on April 18, 2020
    Color: Matte BlackSize: 6' 7" BedConfiguration: Flush FitVerified Purchase