this soft type silicone based material started to be very popular in tying world. Is used mainly for tying worm types of flies also called San Juan Worm flies. Compared with traditional materials like dubbing, chenille, threads and feathers, this squirmy wormy is more a soft type of lure similar with soft lures used in spinning fishing and soft lure fishing
The material is practically a silicone solid tube, very soft and vibrant, full of movement and have a diameter of 2.5mm