Semperfli Dry Fly Polyyarn has been nicknamed by fly tyers worldwide as the ‘floating yarn’. It is so fibrous and so beautifully buggy, that this easy-to-use fly-tying material, indeed Dry Fly Polyyarn is a must-have fly-tying material. Dry Fly Polyyarn is a bonded form of polyyarn which is a dubbing on a rope product from Semperfli. Its tight fibrous bonding makes it ideal for dry flies. Not only does it float naturally but its fibrous design traps air to help your fly float.

Dry Fly Polyyarn is durable and the color choices (including the single color or mottled options) mean there are many natural representations in this polyyarn range. Dry Fly Polyyarn is easy to taper to a point by simply heating. Being part of the dubbing on a roperange this makes it easy to use for beginners and experienced tyers alike.

With a very specific gravity/density of 0.91g/cm3 polypropylene yarn including Dry Fly Polyyarn is lighter than water which means that it floats making it ideal for dry flies.

Many companies claim to use polypropylene yarn however a simple test you can do at home to check if it is genuine polypropylene yarn is to cut a 1 inch / 25mm strip, scrunch it up in your fingers, and drop it into a glass of water. If it is genuine polypropylene yarn then it should dip below the surface and then return to the surface. Indeed leave it for a day and it should still be floating as it is lighter than water and it is this property that makes it very, very special for dry flies.

There are a few fly-tying polyyarns on the market today from different companies. Indeed Semperfli makes two versions of polyyarn – the original Semperfli Polyyarn that comes on cards and is ideal for, most commonly used as parachute posts and dubbing wings, and Dry Fly Polyyarn, which is a spool-based product that is intended for bodies of flies or to create detached bodies.