Brock is a truly unique, patented class of material defined as porous, closed-cell composites, formed by fusing together resilient, closed cell polymer beads only at their tangent points. The result is a durable, non-absorptive composite that allows fluids such as air and water to flow freely throughout the material in all directions. Brock offers a sensible and many times less costly alternative to synthetic materials such as fiberglass, polyurethane, polystyrene and plastics and natural materials such as cork,
rubber and gravel. Brock has set a new standard in high-performance sports padding and protective gear and is rapidly gaining acceptance in other uses where porosity, energy and noise management, airflow, insulation, durability and ease-of-processing are important. Brock is produced with a variety of different bead types depending on the application and desired outcome. Durable polypropylene is typically used for impact absorption and high-strength structural components, while softer polyethylene can be used for cushioning and comfort.