The silk bassoon bocal swabs are designed to be pulled all the way through the bocal. There is an extra cord attached to the wide end of the swab as a safety feature so that if the swab were to become stuck, it could be pulled back out.
The Qualities of Silk
All Hodge silk swabs are made from 100% silk and come in performers black, royal blue, burgundy, forest green, and deep purple. Silk is very absorbent, soaking up water in instruments better than any other natural material on the market, including both cotton and chamois. Most uniquely, silk is also very compressible, making it possible to pull through instruments with large variations in bore size. In addition, silk is lint free.