Soft Hackle Green - Soft Hackle. The Green Soft Hackle fly pattern can be used with fantastic results in a variety of waters, from rivers to lakes. During caddis or mayfly hatches, matching the correct colour soft hackle fly to the colour of the hatch is highly effective. During these times fish the fly in the surface film to mimic an emerging fly. The Green Soft Hackle fly can also be fished deep to mimic a dragonfly or damselfly.