The outer casing is made from high density polyethylene and is manufactured so as to posses a very strong internal cross linked polymer composition. The curved shape provides low friction coefficient with high deflecting properties. The combination of deflection and diffusion properties greatly reduces impact forces being transmitted to the vulnerable front and lateral faces of the rack upright.
The inner is made from closed cell polyethylene foam designed to induce inertia and an exaggerated path to shock forces. The shock isolator received residual impact energy from the external deflector, momentarily stores this energy and releases it over a longer period of time and the larger internal area. The remaining proportion of impact force is rebounded back through the external deflector and away from the racking.