A: Single Covered Yarn -SCY Single Covered Yarn - Conventional is wrapped by a single non-elastic filament yarn. It can be divided into two specifications-Z twist yarn (clockwise) , S-twist yarn(anti-clockwise).It is usually used in Z twist in Lycra fabric. But socks, underwear will used both S and Z according to body structure of characters. Application: Tightsã?�Woven fabricsã?�Flat knittingã?�Narrow fabricsã?�Circular knitting â?º B: Double Covered Yarn -DCY Double Covered Yarn - Conventional is wrapped by two yarns in opposite directions .One is S twist yarns, and the other is Z twist yarns (outer cover and inner cover) ,.It is very good for weaving and knitting than SCY, the different of number of TPM will make various sense of touch. Application: Tightsã?�Woven fabricsã?�Flat knittingã?�Narrow fabricsã?�Circular knitting