1. The thick micro-type nylon fabric is , high quality and flexible. It can be washed and reused as needed. The ultra-fine mesh can capture all small particles, keep the pool filter clean, promote pool water circulation, and let your pool filter run more efficiently. It is recommended to replace the pool socks every 4 to 8 weeks. 2. The simple make pool maintenance simple and protect the pump impeller and the shaft seal of the pool, so your filter system have a longer life. 3. Easy to install, very flexible, suitable for most types of pool pumps, pool baskets or filter baskets. Simply stretch them over the basket, put them back in the basket, and replace the filter socks regularly. 4. No expensive repairs are required, which helps your pool maintenance. They can catch oil, hair, bugs, grass, pollen, leaves, pine needles and any other small debris. A simple and effective way to protect your pool filter. 5. The ideal swimming pool accessory, wear the filter socks and enjoy finer filtration and a cleaner pool. The pool socks collect all the debris before they get clogged, so your filter system use longer! Perfect for both in-ground and above-ground pools. Colour:White Material:nylon Package Contents: 250 x filter bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.