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10 Pack Pool Spa Skimmer Basket Pre-Filter Saver Bag Socks for Filters, Baskets, and Skimmers Product Features: Consisting of an extremely fine mesh material bound to a durable elastic ring, the skimmer sock prevents debris, hair, grass, leaves, scum, pine needles, pollen and bugs from clogging the filter system.The filter sock fits most skimmer baskets like a glove. Elastic band holds them tight on the edge to catch small debris that would clog up the pump or filter. This allows your filter to run a little longer between cleanings. Makes filter cartridge cleaning much easier and a lot less messy. When soiled, just toss it... or spray with a garden hose. Each can be reused several times, if desired. Fits any shape skimmer basket.Filter Sock is sold in a pack of 10. Each filter sock is re-useable when rinsed and cleaned and can be used for weeks.