Pool Socks SkimmerEffectively keep the pool cleaner with this pre-filter. Collects fine particles, insects, dirt, dust, leaves, hair, protects your filters, including dog hair, even catches the sand released by the pump filter. You won't have all that dirt, bugs and hair floating on the water. And it makes your pool crystal clear and incredibly inviting. Protective Pool Filter SystemsCollects all the crap preventing it from getting to the pump. Protects the pump impeller and shaft seal from damage or clogging and prolongs the life of the pool strainer/filter system. High Elasticity & Universal SizeSize: 22 x 13 cm(LxW), and the socks have good elasticity to stretch easily and enough for almost all kinds of pool skimmer basket. Replace or clean the skimmer socks every 4-6 weeks, no need to worry about cleaning the skimmer filter, save time and energy. Nylon Filter Socks SkimmerThe 15 pack pool filter socks are made of something like nylon, polyester or polypropylene rather than cotton for longer lifespan. It's a great way to reduce pool costs for anyone with a pool or above ground pool. Sock Net for Pool CleaningIt is very simple and easy to use. All you have to do is unzip the sock, pop it into the skimmer and let the all-important water pass through. Do not put the chlorine tablet on it as it will fall apart, leave it under the sock.