Catamarans have a number of design elements that put them among the fastest sail/motorized vehicles on the seas. The hulls of a sail-powered catamaran are made of fibreglass fabric, foam or another lightweight material, allowing them to catch a large amount of wind. This allows the catamaran to reach a higher speed, as there is less contact with the water.
When compared to a single-hulled boat, the twin-hull shape of a catamaran has more advantages. The wide berth of the two hulls makes the whole boat very stable.
This means that the sail is more likely to stay upright in a heavy gust than that of a monohull, allowing it to draw more power and be larger than that on a single-hull.
This stability also means that a catamaran does not need a counterweight to prevent it tipping over, making it very light and easily manoeuvrable, although there is an increased risk of capsizing.
The hulls of a catamaran are much thinner than those on a single-hulled boat, meaning that there is a smaller surface area in contact with the water and therefore less friction, which allows them to reach higher speeds. How to Sail a Catamaran Sailboat