Bestop 15135-01 ZipRail Truck Tonneau Cover for Ford F250/Ford F350, 8' Bed, 1999-2012 Leather-grain premium vinyl/polyester fabric stays flexible in cold weather, features limited lifetime warranty Proven BeltRail attachment system features quick-release tabs, variable-position clamps for no-drill install Aluminum bows span across truck bed to support the tonneau, help prevent puddling Easy access to truck bed and cargo by simply dropping tailgate or by pulling up the cover Limited Lifetime Warranty