US Design Patented Cover is dual-coated and made out of heavy duty 24oz marine-grade vinyl, with aircraft-grade aluminum frames, and comes with stainless steel clamps for easy installation and great durability. Pre-assembled horizontal crossbars offer support and conveniently fold up with the cover providing full bed access when needed. The cover folds easily for speedy access to the truck bed and also provides added protection to your cargo with a customized look Easy no drilling installation with instruction and mounting hardware provided. | NOTE: Small holes will need to be cut in the bed liner for vehicles equipped with over-the-bedrail bed liner to secure the clamps for proper cover installation; cover will work with under-the-bedrail bed liner without modification.