VERY similar to Mop Chenille texture and in 3 different sizes and in many colors. The 2mm is ideal for the standard San Juan worm type patterns and in place of the Ultra Chenille. Also, the 3,5mm gives a larger worm pattern AND a wonderful tail for leech patterns as this undulates in the water comparable to real leeches. Strong and easy to work with, not as stiff as Ultra type chenilles. Great product and great pricing.