MFC GSP Thread

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Tie stronger flies with less thread. MFC GSP (Gel Spun Polyester) Thread is incredibly thin yet pound-for-pound one of the strongest tying threads available — letting you lock down materials with minimal bulk and maximum holding power.GSP excels anywhere you need a secure, low-profile foundation: spinning deer hair, tying saltwater patterns, building tight heads, or working with slippery synthetics that standard thread can't grip. Once you tie with it, you won't go back. Gel Spun Polyester (GSP) construction — ultra-strong, ultra-thin Minimal stretch for precise tension control Excellent for spinning deer hair, saltwater flies, and synthetic materials Low bulk for clean, professional-looking heads and bodies From MFC — trusted by tiers who demand performance Show more