home made string help

Lately I have been making homemade string. The thread I have been using works but it is not the greatest.
Can somebody recommend me a good poly and nylon thread that I can order online?

For poly, go with coats and Clark dual duty xp, or coats and Clark trilobal. Personally I mix them half and half and it makes for a very soft but whippy string without the roughness of nylon.

Experiment.