Fulling Mill Pro GSP is a gel-spun polyethylene thread: very strong for its diameter, low stretch and flat-lying. Use it for spinning and stacking deer hair, flaring materials, and securing heavy streamer and articulated fly components without breaking.

• 30, 50, 100 and 150 denier
• 30 and 50 denier in White, Black, Olive and Tan; 100 and 150 denier in White (colors well with a marker)
• 100 meters per spool