HydraFlex™ HD-Series are three-layer co-extruded geomembranes consisting of high-density polyethylene outer layers with an inner core of flexible and conforming linear-low-density polyethylene. The outer layers are formulated to provide an outstanding balance of environmental stress crack resistance and toughness, for excellent resistance to aqueous chemicals and solvents. HydraFlex™ is stabilized with carbon black, antioxidants and UV stabilizers for long-term exposed applications.