SEMPERFLI Polyyarn € 3.80 Poly-Yarn is a non-bonded continuous which makes it ideal for bodies, parachute posts, indicators and even as a dubbing. - + Shop This product has been added to your cart. Reference : 886741001182 Category : Fly tying Brand : SEMPERFLI _ : _ C Semperfli : Beige Crème Medium Olive Description Reviews Product details Poly-Yarn is an amazing carded floating material.Poly-Yarn is a non-bonded continuous which makes it ideal for bodies, parachute posts, indicators and even as a dubbing.Poly-Yarn has a specific gravity/density of 0.91 g/cm³ making it lighter than water. This means you can rely on this material for your flies completely being buoyant. Add review