Material The pool skimmer socks are made of nylon cloth with good quality, and they have good elasticity to stretch easily and enough to cover the skimmer basket, fit for use in swimming pools. Easy to UseInstalls in seconds, simply slide the sock over the basket and it's ready for capturing debris from the water. Extend the Life of Your Swimming Pool Filter SystemPool socks protect the pump impeller and shaft seal from damage and clogging, prolonging the life of your pool filter and filtration system. Please do not use the product while dissolving a chlorine tablet in your basketOtherwise the Soc will be eroded. And you should replace or clean the socks every 4 to 6 weeks if they are too dirty to stop the water flow.