92% SK75 Dyneema®, 8% GORETM fiber. Highest speed and higher durability; preferred by some compound shooters - particularly 3D. Also the choice of Olympic style recurve shooters. 1/4# spools available in : black, blue, brown, fl.green, fl.orng, gold, green, metallic bronze, mountain berry, olive,  orange, pink, purple, red, silver, tan, white, yellow, and combo colors : green/black, tan/black, yellow/black.