The architecture of “Koala Hi-Tech” includes an ultra-modern hull, the result of the latest developments in hydrodynamics applied to Open and IMS racers, with a fine, lightweight design for the bow and notable volume in the stern, plus very tight longitudinal “buttocks”. Displacement is quite light, to optimise planing and passage over the waves. “Koala” also has a centre board with 2,000 kg end bulb, which means draught can be varied from 2 to 3.2 m, favouring, on one hand, the cruiser’s needs for reduced draught, and on the other, extremely high stability and hold for the sail. To achieve such light displacement and high weight concentration with a 60% ballast ratio, all in the end bulb, the boat was built in composite material, using unidirectional Kevlar and carbon fibres, vacuum impregnated with epoxy resin and post-cured at 70° C on a termanto core with variable density. The same technique and materials were used for the fittings. The sail plan is regatta-based. The carbon mast has spreaders slightly angled aft, without running rigging, and set right back for better trim; there will be a large batten main, a genoa with low overlap, a removable foremast and a large gennaker with retracting bowsprit. This type of rig not only offers excellent racing efficiency, it is also notably simple to manoeuvre with a smaller crew, meaning the boat is easier to use when cruising.