Lightweight, durable material with a specific geometric shape, hoisted to enable a sailboat to sail. A sail works like an airplane wing, but vertically, creating, as the wind passes, a high-pressure zone on one side and a low-pressure zone on the other, generating lift that, with the help of the keel/centerboard and the rudder, moves the boat forward in the desired direction. There are various types of sails depending on their purpose, position, and wind strength.