The UnderCover Armor Flex is a hard folding truck bed cover. It is popular due to its combination of low profile design, durability, and ease of use. The construction is made of heavy-duty aluminum panels with a matte black finish and a textured ABS material top panel. The ABS finish is better than the Ultra flex finish as it is more resistant to scratches and fading. It is relatively easy to remove when needed. Hard folding covers are popular for their ease of access and security. The Armor Flex has a locking mechanism to secure the cover and the tailgate, and it can support a significant amount of weight on top. UnderCover truck bed covers are made in the USA. A low-profile hard folding cover is preferred over an over-the-rail style for its sleeker look, improved fuel efficiency, and increased security. Spending extra money on a low-profile cover is worth it for the added benefits.