Drawn thread work is a form of counted thread[?]embroidery based on removing threads from the warp and/or the weft of a piece of evenweave fabric.
The remaining threads are grouped or bundled together into a variety of patterns.
... 18 to 24, 29.5% from 25 to 44, 21.0% from 45 to 64, and 13.5% who are 65 years of age or older. The median age is 35 years. For every 100 females there are 91.9 males. ...