UnderCover's ABS one piece tonneaus have a distinct competitive advantage over fiberglass as they are lighter, easier to remove and store, and more highly engineered. The product's patented design and a proprietary blend of ABS plastics and advanced polymers give the tonneau cover unparalleled strength and durability at a fraction of the weight and cost of a fiberglass tonneau. Most of our covers are about half the weight of a fiberglass tonneau, making it easy to remove while still retaining the structural strength expected of a traditional hard tonneau. Further, all tooling and molds are fabricated in-house to ensure the best fit and finish of any product on the market today. Best of all UnderCover is proudly made in America.