The Robelle Premium Mesh XL winter cover for in-ground pools allows water to pass through into your pool while keeping out dirt and debris. This results in less maintenance during the winter months compared to traditional pool covers. This cover includes an extra-large five feet of overlap, making this the easiest mesh pool cover to secure. Please order a larger size cover if you have steps protruding from your pool. The dense mesh allows only water to pass through and will not lose its integrity over time. Water bag loops are placed every four feet. Premium grommets are sewn into the water bag loops and at each corner. The Robelle Premium Mesh XL winter cover includes a fifteen-year warranty.