The upgrade to D2 Racing and ultimate standard production racing halyard or sheet. Manufactured using our bio-based D12 78 core or D12 99 core for additional strength and 50/50 Technora / Polyester cover to provide even greater performance in clutches, jammer and around winch's. Lightweight, low stretch, minimal creep with grippy, abrasion resistant cover for excellent jammer performance. D2 Grand Prix's blended cover grips well on winch drums and lasts during the toughest races thanks to its high melting point.