MFC Barred Flexi Sexi Floss is a crinkly spandex, custom-dyed to all the popular tying colors. It is great for shiny, durable wrapped bodies, legs, and antennae. It's a great substitute for Round Rubber because it is more resistant to UV rays and is stronger. Very similar to Spirit River Flexi-Floss but barred. Great for Pat's Rubber Leg patterns.