Boom Vang Pulley with Friction Ring + Dyneema Rope. Optimist halyard system with low-friction Windesign ring. This system has been used on all Optimist Blackgold masts since 2017.
The combination of a Harken hook block, a Dyneema spliced halyard, and a low-friction Windesign ring creates the most high-performance halyard system on the market.