Danville Flat Waxed Nylon (210 denier)

This is a heavy weight thread, for Big Flies, that is 'Flat' so it lies flat on the hook shank.
We have made Deer Hair Bass Bugs with many types of thread (including GSP), but we prefer this one over all the others.  It is very strong, and it stretches a little before breaking, to keep you out of trouble.

Ideal for Saltwater Flies as well.

It may be too bulky for smaller flies.