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 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.