1. Skimmer made of nylon material: The 21.5 x 12.5 cm (LW) pool skimmer socks are made of fine nylon fabric and have good elasticity to easily cover the skimmer basket. Fit for swimming pools, ponds, whirlpools, spa. 2.Good choice for pool cleaning: Install in seconds. The pool skimmer socks can filter leaves, grass, hair, oil, pine needles, pollen and other debris. Help keep your pool clean and save costs. 3. Extension of the service life of the filter system: The skimmer filter protects the pump impeller and the shaft seal from damage or clogging and thus extends the service life of the pool filter system. Please do not use the product while you are dissolving a chlorine tablet in your shopping cart. 4. Easy to use: 10 pieces pack, change the new socks every 4-8 weeks. The good choice for you is to check the sock every week; If there is too much rubbish, the pools overflow and make them dirty. 5. Wide compatibility: The skimmer filter socks are suitable for almost all types of pool filters, baskets or skimmers and can be reused several times. They are inexpensive. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.