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UnderCover
UnderCover Ultra Flex
6.6 our score out of 10
Our hard tri-fold pick: it stands clear of the rear glass and seals better than the MX4 at about the same price.
How we score it
| Weather sealing (40%) | 6.5 |
| Durability (35%) | 6.7 |
| Value (25%) | 6.6 |
| Leak risk | Moderate |
Specs
| Rated load | 400 lb (evenly distributed) |
| Install time | 30 min |
| Warranty | 5 years, initial owner, not transferable |
| Material | Aluminum skin over a high-density polymer core |
| Style | Hard Folding |
| Lock | Locks with tailgate |
| Drains | Not published |
| Rack rails | No |
| Confirmed listings for | Gen14 F-150, Gen13 F-150, DT Ram 1500, 3rd Gen Tundra, T1XX Silverado / Sierra, 3rd Gen Colorado / Canyon, 4th Gen Tacoma, 3rd Gen Tacoma, Maverick |
Specs come from the maker; a spec the maker doesn't publish is left off. Fit varies by cab, bed and options, so use the listing for your exact truck.
What owners say
They like that the folded panels stand on prop rods instead of resting on the cab, the low profile, the build and the long service lives, up to nine years. On water they split evenly, four dry and four with some water; one owner gets water at the tailgate in a car wash while another's cover came through one dry, and only one cover began leaking with age, between the panels in year 3.
Where we cover it
- UnderCover SwingCase Review: Great Under a Cover, Fragile With Age
- Access LOMAX vs BAKFlip MX4: The Lift-Off Cover Wins on Water
- Access LOMAX vs WeatherTech AlloyCover: Where You Buy It Decides
- Access LOMAX Review: Our Pick of the Removable Hard Tri-Folds
- Best Tonneau Cover for a Multifunction Tailgate: GM and Ram Picks
- Best Tonneau Cover for a RamBox Ram 1500: Check the Rails First
- WeatherTech AlloyCover Review: Lifts Off Fast, Mostly Dry
- BAKFlip MX4 vs F1: Same Ratings, and the F1 Costs Less
- BAKFlip G2 vs Gator EFX: The Front Third of the Bed Decides It
- Tonneau Cover Install: Steps, Tools and the Mistakes That Cause Leaks
- Most Waterproof Tonneau Cover: The Sentry CT, and Why None Is Sealed
- Tonneau Cover Drain Tubes: How to Route, Trim and Fix Them
- Tonneau Cover Warranty: What Voids It and How to Make a Claim
- Folding vs Retractable Tonneau Cover: Bed Space, Racks and Water
- Tonneau Cover Car Wash: Which Washes Are Safe and How to Clean It
- Hard vs Soft Tonneau Cover: Hard for Security, Soft for Price
- Best Tonneau Cover for a Ram 1500: DT Picks by Tailgate and RamBox
- BAKFlip MX4 vs LEER HF650M: The LEER for Security and a Drier Bed
- Best Tonneau Cover for a Colorado or Canyon: 3rd Gen Picks
- Truck Bed Length: How to Measure and Match a Tonneau Cover
- BAKFlip Won't Latch or Rails Lean In: How to Fix the Clamps
- Best Hard Folding Tonneau Cover: Ultra Flex First, LEER for Security
- BAKFlip MX4 vs UnderCover Ultra Flex: The Drier Bed Decides It
- Tonneau Cover Rattle or Flapping: How to Find and Fix It
- Best Tonneau Cover for a Ford Maverick: Picks for the 4.5 ft Bed
- Best Tonneau Cover for a Tacoma: Picks for 3rd and 4th Gen
- UnderCover Ultra Flex vs Armor Flex: The Coated Top Decides It
- Tonneau Cover Leaking? Where the Water Gets In and How to Fix It
- BAKFlip MX4 vs G2: The Tailgate Decides It