In the mayfly world, a dun is an adult, and this pattern is a mayfly emerger imitation - meaning it is transitioning between the nymph to the adult. During this transition, trout key in on the insects knowing they are more vulnerable than usual. This fly is tied on a curved short shank hook with a parachute post for a most realistic profile.
* SOLD IN BOXES OF 12.
* As of now, RIO flies are available to U.S. shipping addresses only.