THIS HPD COVERS THE FOLLOWING COMMERCIAL MULTILAYER WPC COLLECTIONS WITH ATTACHED CORK UNDERLAYMENT: STRATUM EIRIS, STRATUM DEFINED. WITH PATENTED TECHNOLOGY THAT MAKES IT WATERPROOF, DIMENSIONALLY STABLE AND QUIET, COREtec® DELIVERS REAL PERFORMANCE FOR END USERS. DESIGNED WITH LOCKING EDGES, INSTALLATION IS QUICK AND EASY SAVING INSTALLATION TIME AND LABOR COSTS.