Fly Materials Short Calf Tail 3-Piece Set Calf tail is a standard material for dry fly wings. The wavy hair traps air, providing excellent buoyancy. It sheds water better than synthetic materials and can be used for a long time. While parachute patterns offer good visibility, posts made in popular colors can be easily seen through by fish. It might be a good idea to have some flies with posts in less common colors hidden in your fly box. The good thing about calf tails is that the material is light and blends well with floatant. Also, the taper towards the tip is great, and unlike synthetic materials, the finished product looks beautiful. If the whole tail is twisted or bent, the hairs are spiraled, so comb them well before use. Thank you.