Made from durable elastic and ultrafine nylon mesh, the skimmer acts as a net to attracts and trap leaves, grass, hair, scum, oil, pine needles, pollen, bugs and other debris, preventing them from clogging your pool's filtration system. Protects the pump impeller and shaft seal from damage / clogging, thereby extending the life of your filter / filtration system. Makes cleaning skimmer baskets easier and less messy. Fits nearly any shape skimmer and basket, including baskets produced by Hayward, Pentair and Swimquip. Value pack - 10 per pack. When soiled, clean with garden hose and reuse or throw away (if heavily soiled). Replace with a new sock every 4-8 weeks.