The Vevor pool cover water bag set is designed to secure winter pool covers with reliable edge and corner anchoring. This 6-piece set includes long single-chamber water bags and 4 corner tubes to help keep covers in place against wind, leaves, and debris. Made from thick PVC with reinforced welded seams, the bags are built for leak resistance and repeated seasonal use. A twist-lock cap with rubber gasket helps provide a tighter seal and easier filling. The set is suited for inground pool cover setups that need stable, full-edge support.