Wapsi UTC Ultra GSP is the strongest thread on the planet. Boasting steel-like strength for its weight, this thread really lets you put the pressure on! Waspi gel spun polyethylete is supple, ties flat and is available in the largest selection of colors. This thread is one of the most popular threads to come by so put your order in now. 50 yards per spool.
Choose 50 denier GSP for tying small trout and realistic flies with a minimum of bulk.