Abstract: A mesh system for protecting structural openings, such as windows and doors, from storm damage or intrusion is made of a special cable having an aramid core and a twine twisted steel jacket made of a plurality of steel wires spun onto a bundled aramid fiber core. The mesh includes a substantially straight warp and a woven weft. A mesh system designed for limiting the deflection of the mesh under impact and wind load conditions imposed by a hurricane securely fixes and tensions the mesh along at least the direction of the substantially straight warp. A cable construction, cable diameter, mesh weaving loads and percent open area of the mesh are selected such that the mesh system passes a large missile impact test. Security features including periodic use of a plurality of cables and/or sensors may be added to the mesh.