– ULTRA 70 has a breaking strength of approximately #1 and is recommended for size 14-32 flies
– Lies flat less build up on the smallest trout pattern
– Great for thread bodied nymphs and midges
– 70 denier nylon

– ULTRA 140 has a breaking strength of approximately #2 and is recommended for size 6-14 flies
– A good general purpose thread that is also perfect size for beginners tying trout flies
– Makes a wonderful thread for the split thread dubbing technique
– 140 denier nylon