High Quality Materials - 20 Pieces Pool Filter Sock for swimming pools are made of ultra-thin and dense nylon fabric. It has good elasticity and is easy to stretch, enough to cover the skimmer basket. Pool skimmer socks are strong, durable, elastic and reusable. Perfect Filtration - Elastic fabric fits snugly over your basket so it won't come loose. You just need to change the used bag regularly. Use our pool to be cleaner. We recommend changing the bag every 4-8 weeks. Easy Installation: The skimmer net facilitates and cleans the skimmer pool baskets. What's more, you can simply clean the sock with a garden hose if it gets dirty, to make life more comfortable. Extend the life of your pool filter system: Pool skimmer socks protect the pump impeller and shaft seal from damage and clogging, thus extending the life of your pool filter and filtration system. Wide Application: Pool Skimmer Sock are suitable for all types of swimming pool filters, baskets or skimmers. Net-like filter socks filter waste such as leaves, grass, hair, moss, etc., keep your pool clean and save cost