This is the traditional method of covering Spandex Yarn with Polyester Filament Yarn or Nylon Filament Yarn. 10 denier to 840 denier of spandex is wrapped with one filament yarn such as nylon, polyester, rayon, etc. It can be divided into two types- S and Z twist. It is regularly used Z twist in elastic fabric, but socks and underwear use both S and Z twist to body curve.
| Polyester DTY | Spandex | Color |
| 75D | 20D, 30D, 40D, 70D | RW / DDB / Dope Dyed Colors |
| 100D | 20D, 30D, 40D, 70D | RW / DDB / Dope Dyed Colors |
| 150D | 20D, 30D, 40D, 70D | RW / DDB / Dope Dyed Colors |
| 200D | 20D, 30D, 40D, 70D | RW / DDB / Dope Dyed Colors |
| 300D | 20D, 30D, 40D, 70D | RW / DDB / Dope Dyed Colors |
| Nylon DTY | Spandex | Color |
| 15D to 150D | 20D to 1120D | RW / DDB |
