The Fly Projects Crust Nymph, is a slim profiled mayfly nymph. The fly comes in two colors, BWO and PMD, pictured in PMD. This fly offers a new school meets old school debate with CDC wings that become near translucent in the water, a wood duck tail, a biot body, all covered by the bling of ice dub. The long profile of this fly more accurately represents the mayfly nymphs that we see before they begin their swim to freedom.