- Woven fabrics are made up of warp threads and weft threads.
- The warp threads run down the length of the fabric parallel to the selvedge and make up the straight grain.
- The warp threads are placed first on the loom in the weaving process. These can be hundreds of metres long and run through the entire length of fabric. The weft (or crosswise) threads are then interlaced over and under the warp threads in a regular pattern (or weave).