The Hartmann HydroClean Plus Round 4cm Dressing (609220) is a hydro-responsive wound dressing designed to actively cleanse, debride, and absorb exudate from chronic and poorly healing wounds. It utilizes a unique Rinsing-Absorption Mechanism by continuously releasing Ringer's solution into the wound bed while simultaneously absorbing exudate into a superabsorbent polymer (SAP) core.