« Poly » Rosborough recommended Nymo thread for tying his fuzzy Nymphs because it was strong for its diameter and wound flat. The nymo brand is no longer available, so as a service to fly-tiers, UNI-Products as introduced the same material as UNI-Bond. UNI-Bond is a size A, unwaxed, nylon thread. UNI-Bond is also superb for tying egg flies. Available in five commonly used colours (Black, Green, Gray, Red, White), wax or unwaxed, and on 50 or 100-yard spools.