Material: The pool skimmer socks are made of good quality nylon cloth, and they have good elasticity to stretch easily and enough to cover the skimmer basket, fit for swimming pool use. Extend the service life of your swimming pool filter system: pool socks protect the pump impeller and shaft sealing ring from damage and clogging and thus extend the service life of your pool filter and filter system. Universal Fit: Skimmer socks can be used with most pool skimmer baskets.EASY TO USE: Install in seconds, simply slide the sock over the basket and it's ready to collect debris from the water. Please do not use the product while dissolving a chlorine tablet in your basket. Otherwise the Soc will be eroded. And you should change the socks every 4 to 7 weeks