Fits virtually any shape pool skimmer basket for inground and aboveground pools, and tubs Made of nylon pool basket filter socks with ultrafine mesh fabric and an enduring elastic band, these socks are reusable many times Protects pump impellers and shaft seals from damage and clogging, thereby extending the service life of pool filter systems The fabric is easy to stretch and fits into your pool filter basket; the basket can be easily cleaned by washing and discarding filter socks regularly Use scenarios Regular pool maintenance for inground, aboveground pools, and tubs: insert filter socks into the skimmer basket to trap debris before it reaches the pool filter, helping keep the system cleaner longer Heavy debris periods: during seasons with leaves, pollen, or sand, the socks catch more debris to reduce clogging and lower maintenance frequency Spa or tub applications: suitable for tubs to protect smaller pumps and prolong filter and pump life by preventing debris entry