The ILCA 4 MkII uses a more robust 4.93 oz cloth and adopts a bi-radial construction better suited to modern stiffer materials. Additional updates include:

• A larger sail window
• Standardized reinforcement patches
• An updated batten configuration, aligned with the MkII sail family
• A look-and-feel closer to the ILCA 7 MkII, improving consistency across the MkII range

These changes are intended to improve durability and consistency while minimizing the impact on costs.