The HydroNest Liners are replacement absorbent inserts designed specifically for use with the HydroNest spill-containment system. Each liner rapidly absorbs oils and fuels, trapping contaminants while allowing clean water to pass through, just like the original included with your HydroNest. Sold as individual replacements, these liners do not include the HydroNest unit itself and are intended to keep your setup performing at its best with quick, simple swaps whenever needed.