The North Sails Powerzone Mainsail is the result of many years of on the water X boat racing. Built out of the lightest, most durable Dacron we can find to have the perfect mix of ultimate performance and durability. The shape featured on the Powerzone main is fuller than earlier editions, making it possible to power up and get through tough situations. Whether it is a big blow on Lake Geneva with big waves, or a light drifter on Nagawicka, the Powerzone Mainsail is the sail to have for X Boat ILYA racing!