Jin/polyester composite filament extension product, ultra-fine fiber monofilament is 1/20 of ordinary fiber. After special processing and finishing, the fabric is fluffy and soft, with a large specific surface area and rich capillary effect. The product has water absorption and breathability, dryness and comfort, strong stain removal ability, and antibacterial hygiene. Its water absorption capacity is six times that of ordinary cotton fabrics, and its lifespan is twenty times that of ordinary cotton fabrics. Suitable for making various fabrics such as household cleaning cloths, wiping cloths, yukata hats, clothing fabrics, etc. It has strong water absorption and no fiber residue from cotton fabrics, and is also very suitable for wiping the surfaces of optical glass, glass products, and high-end goods.