Sybai BodyFlex Tube 15mm Transparent

It is used on the head to create a lightweight body, segment up the body of large streamers and keeping materials open, creating volume while being lightweight so it is easy to cast all day with.

The 15 mm version is best suited for creating a "collar" that keeps materials spread out, allowing them to push more water and have the illusion of volume, and for creating a very bulky but light streamer body.