Wool Body Yarn is a 4-ply, 100% wool yarn made from premium quality wool. It is excellent for large nymphs, stoneflies, wet fly patterns, crawfish, streamers, and saltwater flies like the Merkin Crab. It is available in solid and heathered* (blended) colors that look mottled when used fo r the body of a fly. Approximately 5 yards per package.