If you've fished a "mop" fly you will know that they are a pain to cast, and don't sink as fast as they could. RIO's Spice Larva offers a different take on this style, using a furled body that moves well in the water and offers translucency, and also sheds water when cast - making it much more user friendly. It represents an October Caddis larva with a black bead head and brown body and legs. The large 4.3mm tungsten bead and barbless jig hook ensure a fast sink rate and easy releases from all the fish you're going to catch.
The following are the bead sizes per hook:
Size 10 - 4.6 mm