Designed specifically for leader and top shot applications.FC Leader uses Sunline’s new E3 raw material that makes the perfect balance of tensile, and knot strength combined with stretch for optimum leader performance.Features Sunline’s TRP processing for better abraision resistance and improved knot tying. 100%Fluorocarbon with 1.78 specific gravity and low water absorption for negligible strength loss under water. The perfect leader to match up with Sunline SX1 braid.