The 19A9 Numbered Vests are ideal for practices and other trainings sessions. The 19A9 Numbered Vests are machine washable safe because they are made out of 100% nylon micro mesh. The 19A9 Numbered Vests are available in red, orange, royal blue, and yellow. A pack of 19A9 Numbered Vest consists of 18 vests numbered from 1-18.