SockNet Booms are constructed with a strong mesh outer skin encasing a highly-absorbent polypropylene filler. A nylon rope and steel hardware ensure long-lasting durability and easy retrieval. Repels water, and won't sink even when saturated. Folded sweeps to catch sheen behind booms. Net Bag for large oil spills. Water repellent. Oil-Only Particulate sorbs petroleum-based spills that creep into hard-to-reach areas or sprinkle over contained spills for quick cleanup. Sold by the case.