Filament yarn comes in two primary varieties: Yarn made of one continuous strand is known as monofilament yarn. Monofilament yarns are frequently used in industrial textiles, sewing threads, fishing lines, and other applications where strength and durability are crucial.
Multifilament yarn: This kind is made up of many filaments that have been twisted or gathered into one strand. Silk, polyester, and nylon are just a few of the materials that may be used to create multifilament yarns.

They are frequently utilized in industrial applications like ropes and nets as well as textiles like carpets, upholstery, and clothes.
Compared to spun yarns, filament yarns provide a smoother texture, less pilling, and increased strength. Additionally, they frequently have more consistent thickness and look. Furthermore, filament yarns may be designed to have certain qualities like flexibility, moisture wicking, or flame resistance, which qualifies them for a variety of uses.