This is also the thread I use on just about all the flies I tie including Salmon, Steelhead and Predator flies for Pike, Tarpon, etc...That is why you never see thread behind any of the bead patterns I tie. Nano Silk 12/0 and 18/0 for nymphs wets and dries and 6/0 for the larger stuff, but I do tie Intruders with the 12/0.
Fish Tales carries the thread in Calgary and Nile Creek in Comox.