Copper John nymph fishing flies are the hottest nymphing fly patterns on the river.Bead head, slim profile with copper wire body gets deep in the water column quicklyExcellent trout, panfish. bass or steelhead flies. 6 hand tied wet flies hook size 10Fish singly, in two or three fly nymph rigs, or as a dropper under a foam hopper flyEssential on freestone rivers where insect nymphs are an important trout food.