Optimist Double Mainsheet Block – PolarWave 40 mm + 29 mm

This Optimist double mainsheet block is designed for smooth, efficient sheeting and easy control in all conditions. The setup combines a PolarWave 40 mm block with a PolarWave 29 mm block, professionally spliced together using 4 mm Marlow Dyneema® SK78 for a clean, low-friction system that is ready to rig straight out of the box.

The combination allows you to easily switch between 4:1 and 3:1 sheeting, giving sailors the flexibility to adapt their setup to conditions, sailor weight, or personal preference. Lightweight, responsive, and durable, this block setup delivers effortless trimming and consistent feel.

Finished with a spliced Dyneema connection, there are no metal parts, no rattling, and minimal friction, exactly what you want in an Optimist mainsheet system.

And because performance should also look good, the PolarWave blocks are available in multiple colours. Mix and match your colours and create your own combination. Opti sailors, express yourself.

Why this setup works

The larger 40 mm block provides smooth load handling, while the 29 mm block keeps the system compact and responsive. Combined with Dyneema splicing, this results in a clean, reliable mainsheet system that performs in both light and heavy air.